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Finding the Fourth Proportional to 729.93, 1,092.15 and 436.35

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Solution

The fourth proportional to 729.93, 1,092.15 and 436.35 is: 652.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    729.93 : 1,092.15 = 436.35 : x
  2. Step 2: Convert to fraction form
    729.93/1,092.15 = 436.35/x
  3. Step 3: Cross multiply
    729.93x = 1,092.15 × 436.35
  4. Step 4: Simplify right side
    729.93x = 476,559.65
  5. Step 5: Solve for x
    x = 476,559.65/729.93
  6. Step 6: Final answer
    x = 652.88

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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.