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Finding the Fourth Proportional to 458.66, 687.57 and 170.03

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Solution

The fourth proportional to 458.66, 687.57 and 170.03 is: 254.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.66 : 687.57 = 170.03 : x
  2. Step 2: Convert to fraction form
    458.66/687.57 = 170.03/x
  3. Step 3: Cross multiply
    458.66x = 687.57 × 170.03
  4. Step 4: Simplify right side
    458.66x = 116,907.53
  5. Step 5: Solve for x
    x = 116,907.53/458.66
  6. Step 6: Final answer
    x = 254.89

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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.