Home / 1,005,471,448.36-1,387,742,705.20-665,780,780.55

Finding the Fourth Proportional to 1,005,471,448.36, 1,387,742,705.20 and 665,780,780.55

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Solution

The fourth proportional to 1,005,471,448.36, 1,387,742,705.20 and 665,780,780.55 is: 918,904,681.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,005,471,448.36 : 1,387,742,705.20 = 665,780,780.55 : x
  2. Step 2: Convert to fraction form
    1,005,471,448.36/1,387,742,705.20 = 665,780,780.55/x
  3. Step 3: Cross multiply
    1,005,471,448.36x = 1,387,742,705.20 × 665,780,780.55
  4. Step 4: Simplify right side
    1,005,471,448.36x = 923,932,421,470,624,512
  5. Step 5: Solve for x
    x = 923,932,421,470,624,512/1,005,471,448.36
  6. Step 6: Final answer
    x = 918,904,681.96

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Double scale
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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.