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Finding the Fourth Proportional to 729.19, 1,092.84 and 318.10

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Solution

The fourth proportional to 729.19, 1,092.84 and 318.10 is: 476.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.19 : 1,092.84 = 318.10 : x
  2. Step 2: Convert to fraction form
    729.19/1,092.84 = 318.10/x
  3. Step 3: Cross multiply
    729.19x = 1,092.84 × 318.10
  4. Step 4: Simplify right side
    729.19x = 347,632.40
  5. Step 5: Solve for x
    x = 347,632.40/729.19
  6. Step 6: Final answer
    x = 476.74

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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.