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Finding the Fourth Proportional to 721.83, 1,081.94 and 592.40

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Solution

The fourth proportional to 721.83, 1,081.94 and 592.40 is: 887.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    721.83 : 1,081.94 = 592.40 : x
  2. Step 2: Convert to fraction form
    721.83/1,081.94 = 592.40/x
  3. Step 3: Cross multiply
    721.83x = 1,081.94 × 592.40
  4. Step 4: Simplify right side
    721.83x = 640,935.85
  5. Step 5: Solve for x
    x = 640,935.85/721.83
  6. Step 6: Final answer
    x = 887.93

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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.