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Finding the Fourth Proportional to 720.80, 1,081.76 and 592.32

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Solution

The fourth proportional to 720.80, 1,081.76 and 592.32 is: 888.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.80 : 1,081.76 = 592.32 : x
  2. Step 2: Convert to fraction form
    720.80/1,081.76 = 592.32/x
  3. Step 3: Cross multiply
    720.80x = 1,081.76 × 592.32
  4. Step 4: Simplify right side
    720.80x = 640,748.08
  5. Step 5: Solve for x
    x = 640,748.08/720.80
  6. Step 6: Final answer
    x = 888.94

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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.