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Finding the Fourth Proportional to 1,332.80, 1,999.20 and 563.30

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Solution

The fourth proportional to 1,332.80, 1,999.20 and 563.30 is: 844.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,332.80 : 1,999.20 = 563.30 : x
  2. Step 2: Convert to fraction form
    1,332.80/1,999.20 = 563.30/x
  3. Step 3: Cross multiply
    1,332.80x = 1,999.20 × 563.30
  4. Step 4: Simplify right side
    1,332.80x = 1,126,149.36
  5. Step 5: Solve for x
    x = 1,126,149.36/1,332.80
  6. Step 6: Final answer
    x = 844.95

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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.