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Finding the Fourth Proportional to 721,265.83, 995,105.11 and 415,335.64

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Solution

The fourth proportional to 721,265.83, 995,105.11 and 415,335.64 is: 573,023.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,265.83 : 995,105.11 = 415,335.64 : x
  2. Step 2: Convert to fraction form
    721,265.83/995,105.11 = 415,335.64/x
  3. Step 3: Cross multiply
    721,265.83x = 995,105.11 × 415,335.64
  4. Step 4: Simplify right side
    721,265.83x = 413,302,617,729.12
  5. Step 5: Solve for x
    x = 413,302,617,729.12/721,265.83
  6. Step 6: Final answer
    x = 573,023.98

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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.