Home / 766,604.88-1,057,336.20-721,400.40

Finding the Fourth Proportional to 766,604.88, 1,057,336.20 and 721,400.40

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Solution

The fourth proportional to 766,604.88, 1,057,336.20 and 721,400.40 is: 994,988.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    766,604.88 : 1,057,336.20 = 721,400.40 : x
  2. Step 2: Convert to fraction form
    766,604.88/1,057,336.20 = 721,400.40/x
  3. Step 3: Cross multiply
    766,604.88x = 1,057,336.20 × 721,400.40
  4. Step 4: Simplify right side
    766,604.88x = 762,762,757,614.48
  5. Step 5: Solve for x
    x = 762,762,757,614.48/766,604.88
  6. Step 6: Final answer
    x = 994,988.13

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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.