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Finding the Fourth Proportional to 1,008.28, 1,511.66 and 545.97

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Solution

The fourth proportional to 1,008.28, 1,511.66 and 545.97 is: 818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.28 : 1,511.66 = 545.97 : x
  2. Step 2: Convert to fraction form
    1,008.28/1,511.66 = 545.97/x
  3. Step 3: Cross multiply
    1,008.28x = 1,511.66 × 545.97
  4. Step 4: Simplify right side
    1,008.28x = 825,328.04
  5. Step 5: Solve for x
    x = 825,328.04/1,008.28
  6. Step 6: Final answer
    x = 818.55

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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.