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Finding the Fourth Proportional to 965.32, 1,331.84 and 729.20

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Solution

The fourth proportional to 965.32, 1,331.84 and 729.20 is: 1,006.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    965.32 : 1,331.84 = 729.20 : x
  2. Step 2: Convert to fraction form
    965.32/1,331.84 = 729.20/x
  3. Step 3: Cross multiply
    965.32x = 1,331.84 × 729.20
  4. Step 4: Simplify right side
    965.32x = 971,182.88
  5. Step 5: Solve for x
    x = 971,182.88/965.32
  6. Step 6: Final answer
    x = 1,006.08

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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.