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Finding the Fourth Proportional to 434.28, 651.25 and 156.56

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Solution

The fourth proportional to 434.28, 651.25 and 156.56 is: 234.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.28 : 651.25 = 156.56 : x
  2. Step 2: Convert to fraction form
    434.28/651.25 = 156.56/x
  3. Step 3: Cross multiply
    434.28x = 651.25 × 156.56
  4. Step 4: Simplify right side
    434.28x = 101,959.70
  5. Step 5: Solve for x
    x = 101,959.70/434.28
  6. Step 6: Final answer
    x = 234.78

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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.