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Finding the Fourth Proportional to 625.01, 935.90 and 521.74

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Solution

The fourth proportional to 625.01, 935.90 and 521.74 is: 781.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.01 : 935.90 = 521.74 : x
  2. Step 2: Convert to fraction form
    625.01/935.90 = 521.74/x
  3. Step 3: Cross multiply
    625.01x = 935.90 × 521.74
  4. Step 4: Simplify right side
    625.01x = 488,289.18
  5. Step 5: Solve for x
    x = 488,289.18/625.01
  6. Step 6: Final answer
    x = 781.25

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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.