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Finding the Fourth Proportional to 1,306.71, 1,960.29 and 896.65

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Solution

The fourth proportional to 1,306.71, 1,960.29 and 896.65 is: 1,345.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,306.71 : 1,960.29 = 896.65 : x
  2. Step 2: Convert to fraction form
    1,306.71/1,960.29 = 896.65/x
  3. Step 3: Cross multiply
    1,306.71x = 1,960.29 × 896.65
  4. Step 4: Simplify right side
    1,306.71x = 1,757,689.13
  5. Step 5: Solve for x
    x = 1,757,689.13/1,306.71
  6. Step 6: Final answer
    x = 1,345.13

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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.