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Finding the Fourth Proportional to 398.87, 597.02 and 288.80

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Solution

The fourth proportional to 398.87, 597.02 and 288.80 is: 432.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.87 : 597.02 = 288.80 : x
  2. Step 2: Convert to fraction form
    398.87/597.02 = 288.80/x
  3. Step 3: Cross multiply
    398.87x = 597.02 × 288.80
  4. Step 4: Simplify right side
    398.87x = 172,419.38
  5. Step 5: Solve for x
    x = 172,419.38/398.87
  6. Step 6: Final answer
    x = 432.28

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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.