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Finding the Fourth Proportional to 1,321.32, 1,821.77 and 966.96

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Solution

The fourth proportional to 1,321.32, 1,821.77 and 966.96 is: 1,333.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.32 : 1,821.77 = 966.96 : x
  2. Step 2: Convert to fraction form
    1,321.32/1,821.77 = 966.96/x
  3. Step 3: Cross multiply
    1,321.32x = 1,821.77 × 966.96
  4. Step 4: Simplify right side
    1,321.32x = 1,761,578.72
  5. Step 5: Solve for x
    x = 1,761,578.72/1,321.32
  6. Step 6: Final answer
    x = 1,333.20

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1.5x scale

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.