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Finding the Fourth Proportional to 560.66, 840.88 and 149.78

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Solution

The fourth proportional to 560.66, 840.88 and 149.78 is: 224.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.66 : 840.88 = 149.78 : x
  2. Step 2: Convert to fraction form
    560.66/840.88 = 149.78/x
  3. Step 3: Cross multiply
    560.66x = 840.88 × 149.78
  4. Step 4: Simplify right side
    560.66x = 125,949.30
  5. Step 5: Solve for x
    x = 125,949.30/560.66
  6. Step 6: Final answer
    x = 224.65

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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.