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Finding the Fourth Proportional to 1,812.72, 2,502.65 and 1,246.47

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Solution

The fourth proportional to 1,812.72, 2,502.65 and 1,246.47 is: 1,720.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.72 : 2,502.65 = 1,246.47 : x
  2. Step 2: Convert to fraction form
    1,812.72/2,502.65 = 1,246.47/x
  3. Step 3: Cross multiply
    1,812.72x = 2,502.65 × 1,246.47
  4. Step 4: Simplify right side
    1,812.72x = 3,119,471.91
  5. Step 5: Solve for x
    x = 3,119,471.91/1,812.72
  6. Step 6: Final answer
    x = 1,720.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.