Home / 687,700.20-1,032,327.90-407,375.40

Finding the Fourth Proportional to 687,700.20, 1,032,327.90 and 407,375.40

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Solution

The fourth proportional to 687,700.20, 1,032,327.90 and 407,375.40 is: 611,523.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,700.20 : 1,032,327.90 = 407,375.40 : x
  2. Step 2: Convert to fraction form
    687,700.20/1,032,327.90 = 407,375.40/x
  3. Step 3: Cross multiply
    687,700.20x = 1,032,327.90 × 407,375.40
  4. Step 4: Simplify right side
    687,700.20x = 420,544,991,193.66
  5. Step 5: Solve for x
    x = 420,544,991,193.66/687,700.20
  6. Step 6: Final answer
    x = 611,523.73

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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.