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Finding the Fourth Proportional to 738.28, 1,018.42 and 517.56

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Solution

The fourth proportional to 738.28, 1,018.42 and 517.56 is: 713.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.28 : 1,018.42 = 517.56 : x
  2. Step 2: Convert to fraction form
    738.28/1,018.42 = 517.56/x
  3. Step 3: Cross multiply
    738.28x = 1,018.42 × 517.56
  4. Step 4: Simplify right side
    738.28x = 527,093.46
  5. Step 5: Solve for x
    x = 527,093.46/738.28
  6. Step 6: Final answer
    x = 713.95

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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.