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Finding the Fourth Proportional to 1,173.59, 1,761.45 and 956.71

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Solution

The fourth proportional to 1,173.59, 1,761.45 and 956.71 is: 1,435.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.59 : 1,761.45 = 956.71 : x
  2. Step 2: Convert to fraction form
    1,173.59/1,761.45 = 956.71/x
  3. Step 3: Cross multiply
    1,173.59x = 1,761.45 × 956.71
  4. Step 4: Simplify right side
    1,173.59x = 1,685,195.44
  5. Step 5: Solve for x
    x = 1,685,195.44/1,173.59
  6. Step 6: Final answer
    x = 1,435.93

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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.