Home / 1,005,471,446.36-1,387,742,702.44-665,780,778.55

Finding the Fourth Proportional to 1,005,471,446.36, 1,387,742,702.44 and 665,780,778.55

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Solution

The fourth proportional to 1,005,471,446.36, 1,387,742,702.44 and 665,780,778.55 is: 918,904,679.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,471,446.36 : 1,387,742,702.44 = 665,780,778.55 : x
  2. Step 2: Convert to fraction form
    1,005,471,446.36/1,387,742,702.44 = 665,780,778.55/x
  3. Step 3: Cross multiply
    1,005,471,446.36x = 1,387,742,702.44 × 665,780,778.55
  4. Step 4: Simplify right side
    1,005,471,446.36x = 923,932,416,853,142,272
  5. Step 5: Solve for x
    x = 923,932,416,853,142,272/1,005,471,446.36
  6. Step 6: Final answer
    x = 918,904,679.19

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Double scale
Find fourth proportional to 1,005,471,447.36, 1,387,742,703.82 and 665,780,779.55
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.