Home / 947,405.10-1,421,107.65-547,840.20

Finding the Fourth Proportional to 947,405.10, 1,421,107.65 and 547,840.20

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Solution

The fourth proportional to 947,405.10, 1,421,107.65 and 547,840.20 is: 821,760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    947,405.10 : 1,421,107.65 = 547,840.20 : x
  2. Step 2: Convert to fraction form
    947,405.10/1,421,107.65 = 547,840.20/x
  3. Step 3: Cross multiply
    947,405.10x = 1,421,107.65 × 547,840.20
  4. Step 4: Simplify right side
    947,405.10x = 778,539,899,197.53
  5. Step 5: Solve for x
    x = 778,539,899,197.53/947,405.10
  6. Step 6: Final answer
    x = 821,760.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.