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Finding the Fourth Proportional to 1,972.05, 2,959.11 and 740.31

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Solution

The fourth proportional to 1,972.05, 2,959.11 and 740.31 is: 1,110.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.05 : 2,959.11 = 740.31 : x
  2. Step 2: Convert to fraction form
    1,972.05/2,959.11 = 740.31/x
  3. Step 3: Cross multiply
    1,972.05x = 2,959.11 × 740.31
  4. Step 4: Simplify right side
    1,972.05x = 2,190,658.72
  5. Step 5: Solve for x
    x = 2,190,658.72/1,972.05
  6. Step 6: Final answer
    x = 1,110.85

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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.