Home / 725,134.40-1,087,701.60-389,211.20

Finding the Fourth Proportional to 725,134.40, 1,087,701.60 and 389,211.20

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Solution

The fourth proportional to 725,134.40, 1,087,701.60 and 389,211.20 is: 583,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,134.40 : 1,087,701.60 = 389,211.20 : x
  2. Step 2: Convert to fraction form
    725,134.40/1,087,701.60 = 389,211.20/x
  3. Step 3: Cross multiply
    725,134.40x = 1,087,701.60 × 389,211.20
  4. Step 4: Simplify right side
    725,134.40x = 423,345,644,977.92
  5. Step 5: Solve for x
    x = 423,345,644,977.92/725,134.40
  6. Step 6: Final answer
    x = 583,816.80

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.