Home / 721,631.64-995,853.60-399,363.96

Finding the Fourth Proportional to 721,631.64, 995,853.60 and 399,363.96

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Solution

The fourth proportional to 721,631.64, 995,853.60 and 399,363.96 is: 551,123.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,631.64 : 995,853.60 = 399,363.96 : x
  2. Step 2: Convert to fraction form
    721,631.64/995,853.60 = 399,363.96/x
  3. Step 3: Cross multiply
    721,631.64x = 995,853.60 × 399,363.96
  4. Step 4: Simplify right side
    721,631.64x = 397,708,037,276.26
  5. Step 5: Solve for x
    x = 397,708,037,276.26/721,631.64
  6. Step 6: Final answer
    x = 551,123.34

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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.