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Finding the Fourth Proportional to 1,167.12, 1,611.23 and 956.79

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Solution

The fourth proportional to 1,167.12, 1,611.23 and 956.79 is: 1,320.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.12 : 1,611.23 = 956.79 : x
  2. Step 2: Convert to fraction form
    1,167.12/1,611.23 = 956.79/x
  3. Step 3: Cross multiply
    1,167.12x = 1,611.23 × 956.79
  4. Step 4: Simplify right side
    1,167.12x = 1,541,603.97
  5. Step 5: Solve for x
    x = 1,541,603.97/1,167.12
  6. Step 6: Final answer
    x = 1,320.86

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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.