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Finding the Fourth Proportional to 698.13, 963.41 and 387.63

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Solution

The fourth proportional to 698.13, 963.41 and 387.63 is: 534.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.13 : 963.41 = 387.63 : x
  2. Step 2: Convert to fraction form
    698.13/963.41 = 387.63/x
  3. Step 3: Cross multiply
    698.13x = 963.41 × 387.63
  4. Step 4: Simplify right side
    698.13x = 373,446.62
  5. Step 5: Solve for x
    x = 373,446.62/698.13
  6. Step 6: Final answer
    x = 534.92

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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.