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Finding the Fourth Proportional to 2,872.69, 4,309.65 and 925.04

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Solution

The fourth proportional to 2,872.69, 4,309.65 and 925.04 is: 1,387.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,872.69 : 4,309.65 = 925.04 : x
  2. Step 2: Convert to fraction form
    2,872.69/4,309.65 = 925.04/x
  3. Step 3: Cross multiply
    2,872.69x = 4,309.65 × 925.04
  4. Step 4: Simplify right side
    2,872.69x = 3,986,609.41
  5. Step 5: Solve for x
    x = 3,986,609.41/2,872.69
  6. Step 6: Final answer
    x = 1,387.76

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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.