Home / 725,687.40-1,087,218.90-620,711.40

Finding the Fourth Proportional to 725,687.40, 1,087,218.90 and 620,711.40

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Solution

The fourth proportional to 725,687.40, 1,087,218.90 and 620,711.40 is: 929,944.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    725,687.40 : 1,087,218.90 = 620,711.40 : x
  2. Step 2: Convert to fraction form
    725,687.40/1,087,218.90 = 620,711.40/x
  3. Step 3: Cross multiply
    725,687.40x = 1,087,218.90 × 620,711.40
  4. Step 4: Simplify right side
    725,687.40x = 674,849,165,525.46
  5. Step 5: Solve for x
    x = 674,849,165,525.46/725,687.40
  6. Step 6: Final answer
    x = 929,944.72

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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.