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Finding the Fourth Proportional to 721,720.92, 995,876.28 and 415,683.48

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Solution

The fourth proportional to 721,720.92, 995,876.28 and 415,683.48 is: 573,586.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,720.92 : 995,876.28 = 415,683.48 : x
  2. Step 2: Convert to fraction form
    721,720.92/995,876.28 = 415,683.48/x
  3. Step 3: Cross multiply
    721,720.92x = 995,876.28 × 415,683.48
  4. Step 4: Simplify right side
    721,720.92x = 413,969,317,719.85
  5. Step 5: Solve for x
    x = 413,969,317,719.85/721,720.92
  6. Step 6: Final answer
    x = 573,586.42

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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.