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Finding the Fourth Proportional to 458.70, 687.84 and 170.10

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Solution

The fourth proportional to 458.70, 687.84 and 170.10 is: 255.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.70 : 687.84 = 170.10 : x
  2. Step 2: Convert to fraction form
    458.70/687.84 = 170.10/x
  3. Step 3: Cross multiply
    458.70x = 687.84 × 170.10
  4. Step 4: Simplify right side
    458.70x = 117,001.58
  5. Step 5: Solve for x
    x = 117,001.58/458.70
  6. Step 6: Final answer
    x = 255.07

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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.