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Finding the Fourth Proportional to 1,974.78, 2,959.88 and 741.40

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Solution

The fourth proportional to 1,974.78, 2,959.88 and 741.40 is: 1,111.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,974.78 : 2,959.88 = 741.40 : x
  2. Step 2: Convert to fraction form
    1,974.78/2,959.88 = 741.40/x
  3. Step 3: Cross multiply
    1,974.78x = 2,959.88 × 741.40
  4. Step 4: Simplify right side
    1,974.78x = 2,194,460.57
  5. Step 5: Solve for x
    x = 2,194,460.57/1,974.78
  6. Step 6: Final answer
    x = 1,111.24

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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.