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Finding the Fourth Proportional to 458.14, 687.28 and 149.98

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Solution

The fourth proportional to 458.14, 687.28 and 149.98 is: 224.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.14 : 687.28 = 149.98 : x
  2. Step 2: Convert to fraction form
    458.14/687.28 = 149.98/x
  3. Step 3: Cross multiply
    458.14x = 687.28 × 149.98
  4. Step 4: Simplify right side
    458.14x = 103,078.25
  5. Step 5: Solve for x
    x = 103,078.25/458.14
  6. Step 6: Final answer
    x = 224.99

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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.