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Finding the Fourth Proportional to 458.79, 688.34 and 170.25

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Solution

The fourth proportional to 458.79, 688.34 and 170.25 is: 255.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.79 : 688.34 = 170.25 : x
  2. Step 2: Convert to fraction form
    458.79/688.34 = 170.25/x
  3. Step 3: Cross multiply
    458.79x = 688.34 × 170.25
  4. Step 4: Simplify right side
    458.79x = 117,189.89
  5. Step 5: Solve for x
    x = 117,189.89/458.79
  6. Step 6: Final answer
    x = 255.43

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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.