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Finding the Fourth Proportional to 457.84, 683.42 and 397.20

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Solution

The fourth proportional to 457.84, 683.42 and 397.20 is: 592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    457.84 : 683.42 = 397.20 : x
  2. Step 2: Convert to fraction form
    457.84/683.42 = 397.20/x
  3. Step 3: Cross multiply
    457.84x = 683.42 × 397.20
  4. Step 4: Simplify right side
    457.84x = 271,454.42
  5. Step 5: Solve for x
    x = 271,454.42/457.84
  6. Step 6: Final answer
    x = 592.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.