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Finding the Fourth Proportional to 434.72, 651.87 and 272.25

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Solution

The fourth proportional to 434.72, 651.87 and 272.25 is: 408.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.72 : 651.87 = 272.25 : x
  2. Step 2: Convert to fraction form
    434.72/651.87 = 272.25/x
  3. Step 3: Cross multiply
    434.72x = 651.87 × 272.25
  4. Step 4: Simplify right side
    434.72x = 177,471.61
  5. Step 5: Solve for x
    x = 177,471.61/434.72
  6. Step 6: Final answer
    x = 408.25

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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.