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Finding the Fourth Proportional to 458.48, 686.64 and 349.44

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Solution

The fourth proportional to 458.48, 686.64 and 349.44 is: 523.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.48 : 686.64 = 349.44 : x
  2. Step 2: Convert to fraction form
    458.48/686.64 = 349.44/x
  3. Step 3: Cross multiply
    458.48x = 686.64 × 349.44
  4. Step 4: Simplify right side
    458.48x = 239,939.48
  5. Step 5: Solve for x
    x = 239,939.48/458.48
  6. Step 6: Final answer
    x = 523.34

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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.