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Finding the Fourth Proportional to 1,672.05, 2,507.29 and 747.61

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Solution

The fourth proportional to 1,672.05, 2,507.29 and 747.61 is: 1,121.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.05 : 2,507.29 = 747.61 : x
  2. Step 2: Convert to fraction form
    1,672.05/2,507.29 = 747.61/x
  3. Step 3: Cross multiply
    1,672.05x = 2,507.29 × 747.61
  4. Step 4: Simplify right side
    1,672.05x = 1,874,485.25
  5. Step 5: Solve for x
    x = 1,874,485.25/1,672.05
  6. Step 6: Final answer
    x = 1,121.07

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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.