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Finding the Fourth Proportional to 1,125.77, 1,689.87 and 896.14

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Solution

The fourth proportional to 1,125.77, 1,689.87 and 896.14 is: 1,345.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.77 : 1,689.87 = 896.14 : x
  2. Step 2: Convert to fraction form
    1,125.77/1,689.87 = 896.14/x
  3. Step 3: Cross multiply
    1,125.77x = 1,689.87 × 896.14
  4. Step 4: Simplify right side
    1,125.77x = 1,514,360.10
  5. Step 5: Solve for x
    x = 1,514,360.10/1,125.77
  6. Step 6: Final answer
    x = 1,345.18

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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.