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Finding the Fourth Proportional to 880.02, 1,318.17 and 553.80

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Solution

The fourth proportional to 880.02, 1,318.17 and 553.80 is: 829.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.02 : 1,318.17 = 553.80 : x
  2. Step 2: Convert to fraction form
    880.02/1,318.17 = 553.80/x
  3. Step 3: Cross multiply
    880.02x = 1,318.17 × 553.80
  4. Step 4: Simplify right side
    880.02x = 730,002.55
  5. Step 5: Solve for x
    x = 730,002.55/880.02
  6. Step 6: Final answer
    x = 829.53

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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.