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Finding the Fourth Proportional to 560.75, 840.24 and 423.70

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Solution

The fourth proportional to 560.75, 840.24 and 423.70 is: 634.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    560.75 : 840.24 = 423.70 : x
  2. Step 2: Convert to fraction form
    560.75/840.24 = 423.70/x
  3. Step 3: Cross multiply
    560.75x = 840.24 × 423.70
  4. Step 4: Simplify right side
    560.75x = 356,007.59
  5. Step 5: Solve for x
    x = 356,007.59/560.75
  6. Step 6: Final answer
    x = 634.88

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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.