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Finding the Fourth Proportional to 726.39, 1,089.99 and 543.24

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Solution

The fourth proportional to 726.39, 1,089.99 and 543.24 is: 815.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    726.39 : 1,089.99 = 543.24 : x
  2. Step 2: Convert to fraction form
    726.39/1,089.99 = 543.24/x
  3. Step 3: Cross multiply
    726.39x = 1,089.99 × 543.24
  4. Step 4: Simplify right side
    726.39x = 592,126.17
  5. Step 5: Solve for x
    x = 592,126.17/726.39
  6. Step 6: Final answer
    x = 815.16

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.