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Finding the Fourth Proportional to 1,031.08, 1,545.02 and 814.12

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Solution

The fourth proportional to 1,031.08, 1,545.02 and 814.12 is: 1,219.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.08 : 1,545.02 = 814.12 : x
  2. Step 2: Convert to fraction form
    1,031.08/1,545.02 = 814.12/x
  3. Step 3: Cross multiply
    1,031.08x = 1,545.02 × 814.12
  4. Step 4: Simplify right side
    1,031.08x = 1,257,831.68
  5. Step 5: Solve for x
    x = 1,257,831.68/1,031.08
  6. Step 6: Final answer
    x = 1,219.92

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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.