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Finding the Fourth Proportional to 521.12, 718.75 and 363.70

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Solution

The fourth proportional to 521.12, 718.75 and 363.70 is: 501.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.12 : 718.75 = 363.70 : x
  2. Step 2: Convert to fraction form
    521.12/718.75 = 363.70/x
  3. Step 3: Cross multiply
    521.12x = 718.75 × 363.70
  4. Step 4: Simplify right side
    521.12x = 261,411.73
  5. Step 5: Solve for x
    x = 261,411.73/521.12
  6. Step 6: Final answer
    x = 501.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.