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Finding the Fourth Proportional to 1,170.11, 1,755.61 and 974.23

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Solution

The fourth proportional to 1,170.11, 1,755.61 and 974.23 is: 1,461.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,170.11 : 1,755.61 = 974.23 : x
  2. Step 2: Convert to fraction form
    1,170.11/1,755.61 = 974.23/x
  3. Step 3: Cross multiply
    1,170.11x = 1,755.61 × 974.23
  4. Step 4: Simplify right side
    1,170.11x = 1,710,361.11
  5. Step 5: Solve for x
    x = 1,710,361.11/1,170.11
  6. Step 6: Final answer
    x = 1,461.71

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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.