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Finding the Fourth Proportional to 721,281.39, 995,442.47 and 415,369.31

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Solution

The fourth proportional to 721,281.39, 995,442.47 and 415,369.31 is: 573,252.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,281.39 : 995,442.47 = 415,369.31 : x
  2. Step 2: Convert to fraction form
    721,281.39/995,442.47 = 415,369.31/x
  3. Step 3: Cross multiply
    721,281.39x = 995,442.47 × 415,369.31
  4. Step 4: Simplify right side
    721,281.39x = 413,476,244,854.54
  5. Step 5: Solve for x
    x = 413,476,244,854.54/721,281.39
  6. Step 6: Final answer
    x = 573,252.34

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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.