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Finding the Fourth Proportional to 521.02, 781.25 and 174.23

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Solution

The fourth proportional to 521.02, 781.25 and 174.23 is: 261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.02 : 781.25 = 174.23 : x
  2. Step 2: Convert to fraction form
    521.02/781.25 = 174.23/x
  3. Step 3: Cross multiply
    521.02x = 781.25 × 174.23
  4. Step 4: Simplify right side
    521.02x = 136,113.72
  5. Step 5: Solve for x
    x = 136,113.72/521.02
  6. Step 6: Final answer
    x = 261.25

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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.