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Finding the Fourth Proportional to 588.20, 811.14 and 457

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Solution

The fourth proportional to 588.20, 811.14 and 457 is: 630.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.20 : 811.14 = 457 : x
  2. Step 2: Convert to fraction form
    588.20/811.14 = 457/x
  3. Step 3: Cross multiply
    588.20x = 811.14 × 457
  4. Step 4: Simplify right side
    588.20x = 370,690.98
  5. Step 5: Solve for x
    x = 370,690.98/588.20
  6. Step 6: Final answer
    x = 630.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.