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Finding the Fourth Proportional to 721,848.31, 995,906.64 and 415,916.78

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Solution

The fourth proportional to 721,848.31, 995,906.64 and 415,916.78 is: 573,824.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,848.31 : 995,906.64 = 415,916.78 : x
  2. Step 2: Convert to fraction form
    721,848.31/995,906.64 = 415,916.78/x
  3. Step 3: Cross multiply
    721,848.31x = 995,906.64 × 415,916.78
  4. Step 4: Simplify right side
    721,848.31x = 414,214,279,469.57
  5. Step 5: Solve for x
    x = 414,214,279,469.57/721,848.31
  6. Step 6: Final answer
    x = 573,824.55

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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.