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Finding the Fourth Proportional to 1,691.74, 2,334.18 and 983.70

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Solution

The fourth proportional to 1,691.74, 2,334.18 and 983.70 is: 1,357.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,691.74 : 2,334.18 = 983.70 : x
  2. Step 2: Convert to fraction form
    1,691.74/2,334.18 = 983.70/x
  3. Step 3: Cross multiply
    1,691.74x = 2,334.18 × 983.70
  4. Step 4: Simplify right side
    1,691.74x = 2,296,132.87
  5. Step 5: Solve for x
    x = 2,296,132.87/1,691.74
  6. Step 6: Final answer
    x = 1,357.26

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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.