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Finding the Fourth Proportional to 964.92, 1,331.55 and 571.95

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Solution

The fourth proportional to 964.92, 1,331.55 and 571.95 is: 789.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    964.92 : 1,331.55 = 571.95 : x
  2. Step 2: Convert to fraction form
    964.92/1,331.55 = 571.95/x
  3. Step 3: Cross multiply
    964.92x = 1,331.55 × 571.95
  4. Step 4: Simplify right side
    964.92x = 761,580.02
  5. Step 5: Solve for x
    x = 761,580.02/964.92
  6. Step 6: Final answer
    x = 789.27

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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.