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Finding the Fourth Proportional to 398,002.40, 595,691.40 and 279,904.40

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Solution

The fourth proportional to 398,002.40, 595,691.40 and 279,904.40 is: 418,933.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,002.40 : 595,691.40 = 279,904.40 : x
  2. Step 2: Convert to fraction form
    398,002.40/595,691.40 = 279,904.40/x
  3. Step 3: Cross multiply
    398,002.40x = 595,691.40 × 279,904.40
  4. Step 4: Simplify right side
    398,002.40x = 166,736,643,902.16
  5. Step 5: Solve for x
    x = 166,736,643,902.16/398,002.40
  6. Step 6: Final answer
    x = 418,933.76

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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.