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Finding the Fourth Proportional to 961.50, 1,326.87 and 547.50

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Solution

The fourth proportional to 961.50, 1,326.87 and 547.50 is: 755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.50 : 1,326.87 = 547.50 : x
  2. Step 2: Convert to fraction form
    961.50/1,326.87 = 547.50/x
  3. Step 3: Cross multiply
    961.50x = 1,326.87 × 547.50
  4. Step 4: Simplify right side
    961.50x = 726,461.33
  5. Step 5: Solve for x
    x = 726,461.33/961.50
  6. Step 6: Final answer
    x = 755.55

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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.