Home / 687,002.40-1,030,023.60-406,375.20

Finding the Fourth Proportional to 687,002.40, 1,030,023.60 and 406,375.20

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Solution

The fourth proportional to 687,002.40, 1,030,023.60 and 406,375.20 is: 609,278.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,002.40 : 1,030,023.60 = 406,375.20 : x
  2. Step 2: Convert to fraction form
    687,002.40/1,030,023.60 = 406,375.20/x
  3. Step 3: Cross multiply
    687,002.40x = 1,030,023.60 × 406,375.20
  4. Step 4: Simplify right side
    687,002.40x = 418,576,046,454.72
  5. Step 5: Solve for x
    x = 418,576,046,454.72/687,002.40
  6. Step 6: Final answer
    x = 609,278.87

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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.