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Finding the Fourth Proportional to 965.54, 1,332.09 and 572.55

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Solution

The fourth proportional to 965.54, 1,332.09 and 572.55 is: 789.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.54 : 1,332.09 = 572.55 : x
  2. Step 2: Convert to fraction form
    965.54/1,332.09 = 572.55/x
  3. Step 3: Cross multiply
    965.54x = 1,332.09 × 572.55
  4. Step 4: Simplify right side
    965.54x = 762,688.13
  5. Step 5: Solve for x
    x = 762,688.13/965.54
  6. Step 6: Final answer
    x = 789.91

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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.