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Finding the Fourth Proportional to 1,839.85, 2,754.86 and 972.34

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Solution

The fourth proportional to 1,839.85, 2,754.86 and 972.34 is: 1,455.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,839.85 : 2,754.86 = 972.34 : x
  2. Step 2: Convert to fraction form
    1,839.85/2,754.86 = 972.34/x
  3. Step 3: Cross multiply
    1,839.85x = 2,754.86 × 972.34
  4. Step 4: Simplify right side
    1,839.85x = 2,678,660.57
  5. Step 5: Solve for x
    x = 2,678,660.57/1,839.85
  6. Step 6: Final answer
    x = 1,455.91

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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.