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Finding the Fourth Proportional to 645,613.20, 968,419.80 and 531,451.80

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Solution

The fourth proportional to 645,613.20, 968,419.80 and 531,451.80 is: 797,177.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,613.20 : 968,419.80 = 531,451.80 : x
  2. Step 2: Convert to fraction form
    645,613.20/968,419.80 = 531,451.80/x
  3. Step 3: Cross multiply
    645,613.20x = 968,419.80 × 531,451.80
  4. Step 4: Simplify right side
    645,613.20x = 514,668,445,865.64
  5. Step 5: Solve for x
    x = 514,668,445,865.64/645,613.20
  6. Step 6: Final answer
    x = 797,177.70

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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.