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Finding the Fourth Proportional to 579.98, 869.98 and 147.14

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Solution

The fourth proportional to 579.98, 869.98 and 147.14 is: 220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.98 : 869.98 = 147.14 : x
  2. Step 2: Convert to fraction form
    579.98/869.98 = 147.14/x
  3. Step 3: Cross multiply
    579.98x = 869.98 × 147.14
  4. Step 4: Simplify right side
    579.98x = 128,008.86
  5. Step 5: Solve for x
    x = 128,008.86/579.98
  6. Step 6: Final answer
    x = 220.71

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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.