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Finding the Fourth Proportional to 1,732.91, 2,391.42 and 986.91

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Solution

The fourth proportional to 1,732.91, 2,391.42 and 986.91 is: 1,361.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,732.91 : 2,391.42 = 986.91 : x
  2. Step 2: Convert to fraction form
    1,732.91/2,391.42 = 986.91/x
  3. Step 3: Cross multiply
    1,732.91x = 2,391.42 × 986.91
  4. Step 4: Simplify right side
    1,732.91x = 2,360,116.31
  5. Step 5: Solve for x
    x = 2,360,116.31/1,732.91
  6. Step 6: Final answer
    x = 1,361.94

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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.