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Finding the Fourth Proportional to 458.72, 686.47 and 375.49

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Solution

The fourth proportional to 458.72, 686.47 and 375.49 is: 561.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.72 : 686.47 = 375.49 : x
  2. Step 2: Convert to fraction form
    458.72/686.47 = 375.49/x
  3. Step 3: Cross multiply
    458.72x = 686.47 × 375.49
  4. Step 4: Simplify right side
    458.72x = 257,762.62
  5. Step 5: Solve for x
    x = 257,762.62/458.72
  6. Step 6: Final answer
    x = 561.92

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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.