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Finding the Fourth Proportional to 1,974.33, 2,961.51 and 742.02

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Solution

The fourth proportional to 1,974.33, 2,961.51 and 742.02 is: 1,113.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.33 : 2,961.51 = 742.02 : x
  2. Step 2: Convert to fraction form
    1,974.33/2,961.51 = 742.02/x
  3. Step 3: Cross multiply
    1,974.33x = 2,961.51 × 742.02
  4. Step 4: Simplify right side
    1,974.33x = 2,197,499.65
  5. Step 5: Solve for x
    x = 2,197,499.65/1,974.33
  6. Step 6: Final answer
    x = 1,113.04

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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.