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Finding the Fourth Proportional to 458.73, 686.57 and 384.93

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Solution

The fourth proportional to 458.73, 686.57 and 384.93 is: 576.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.73 : 686.57 = 384.93 : x
  2. Step 2: Convert to fraction form
    458.73/686.57 = 384.93/x
  3. Step 3: Cross multiply
    458.73x = 686.57 × 384.93
  4. Step 4: Simplify right side
    458.73x = 264,279.47
  5. Step 5: Solve for x
    x = 264,279.47/458.73
  6. Step 6: Final answer
    x = 576.11

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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.