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Finding the Fourth Proportional to 721,337.36, 995,474.90 and 399,041.92

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Solution

The fourth proportional to 721,337.36, 995,474.90 and 399,041.92 is: 550,694.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,337.36 : 995,474.90 = 399,041.92 : x
  2. Step 2: Convert to fraction form
    721,337.36/995,474.90 = 399,041.92/x
  3. Step 3: Cross multiply
    721,337.36x = 995,474.90 × 399,041.92
  4. Step 4: Simplify right side
    721,337.36x = 397,236,215,407.81
  5. Step 5: Solve for x
    x = 397,236,215,407.81/721,337.36
  6. Step 6: Final answer
    x = 550,694.08

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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.