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Finding the Fourth Proportional to 861,355.60, 1,188,658.88 and 479,382.32

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Solution

The fourth proportional to 861,355.60, 1,188,658.88 and 479,382.32 is: 661,541.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,355.60 : 1,188,658.88 = 479,382.32 : x
  2. Step 2: Convert to fraction form
    861,355.60/1,188,658.88 = 479,382.32/x
  3. Step 3: Cross multiply
    861,355.60x = 1,188,658.88 × 479,382.32
  4. Step 4: Simplify right side
    861,355.60x = 569,822,051,583.00
  5. Step 5: Solve for x
    x = 569,822,051,583.00/861,355.60
  6. Step 6: Final answer
    x = 661,541.01

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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.