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Finding the Fourth Proportional to 861,499.68, 1,188,843.12 and 479,516.64

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Solution

The fourth proportional to 861,499.68, 1,188,843.12 and 479,516.64 is: 661,718.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,499.68 : 1,188,843.12 = 479,516.64 : x
  2. Step 2: Convert to fraction form
    861,499.68/1,188,843.12 = 479,516.64/x
  3. Step 3: Cross multiply
    861,499.68x = 1,188,843.12 × 479,516.64
  4. Step 4: Simplify right side
    861,499.68x = 570,070,058,389.52
  5. Step 5: Solve for x
    x = 570,070,058,389.52/861,499.68
  6. Step 6: Final answer
    x = 661,718.25

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Double scale
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1.5x scale

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.