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Finding the Fourth Proportional to 2,640.74, 3,959.95 and 1,254.48

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Solution

The fourth proportional to 2,640.74, 3,959.95 and 1,254.48 is: 1,881.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.74 : 3,959.95 = 1,254.48 : x
  2. Step 2: Convert to fraction form
    2,640.74/3,959.95 = 1,254.48/x
  3. Step 3: Cross multiply
    2,640.74x = 3,959.95 × 1,254.48
  4. Step 4: Simplify right side
    2,640.74x = 4,967,678.08
  5. Step 5: Solve for x
    x = 4,967,678.08/2,640.74
  6. Step 6: Final answer
    x = 1,881.17

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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.