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Finding the Fourth Proportional to 654,345.20, 981,517.80 and 648,124.40

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Solution

The fourth proportional to 654,345.20, 981,517.80 and 648,124.40 is: 972,186.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,345.20 : 981,517.80 = 648,124.40 : x
  2. Step 2: Convert to fraction form
    654,345.20/981,517.80 = 648,124.40/x
  3. Step 3: Cross multiply
    654,345.20x = 981,517.80 × 648,124.40
  4. Step 4: Simplify right side
    654,345.20x = 636,145,635,214.32
  5. Step 5: Solve for x
    x = 636,145,635,214.32/654,345.20
  6. Step 6: Final answer
    x = 972,186.60

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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.