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Finding the Fourth Proportional to 484.20, 725.10 and 397.76

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Solution

The fourth proportional to 484.20, 725.10 and 397.76 is: 595.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.20 : 725.10 = 397.76 : x
  2. Step 2: Convert to fraction form
    484.20/725.10 = 397.76/x
  3. Step 3: Cross multiply
    484.20x = 725.10 × 397.76
  4. Step 4: Simplify right side
    484.20x = 288,412.15
  5. Step 5: Solve for x
    x = 288,412.15/484.20
  6. Step 6: Final answer
    x = 595.65

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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.