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Finding the Fourth Proportional to 965.18, 1,331.86 and 545.57

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Solution

The fourth proportional to 965.18, 1,331.86 and 545.57 is: 752.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.18 : 1,331.86 = 545.57 : x
  2. Step 2: Convert to fraction form
    965.18/1,331.86 = 545.57/x
  3. Step 3: Cross multiply
    965.18x = 1,331.86 × 545.57
  4. Step 4: Simplify right side
    965.18x = 726,616.20
  5. Step 5: Solve for x
    x = 726,616.20/965.18
  6. Step 6: Final answer
    x = 752.83

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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.