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Finding the Fourth Proportional to 1,321.58, 1,981.96 and 1,060.97

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Solution

The fourth proportional to 1,321.58, 1,981.96 and 1,060.97 is: 1,591.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.58 : 1,981.96 = 1,060.97 : x
  2. Step 2: Convert to fraction form
    1,321.58/1,981.96 = 1,060.97/x
  3. Step 3: Cross multiply
    1,321.58x = 1,981.96 × 1,060.97
  4. Step 4: Simplify right side
    1,321.58x = 2,102,792.84
  5. Step 5: Solve for x
    x = 2,102,792.84/1,321.58
  6. Step 6: Final answer
    x = 1,591.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.