Home / 2,638.74-3,955.76-1,251.21

Finding the Fourth Proportional to 2,638.74, 3,955.76 and 1,251.21

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Solution

The fourth proportional to 2,638.74, 3,955.76 and 1,251.21 is: 1,875.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.74 : 3,955.76 = 1,251.21 : x
  2. Step 2: Convert to fraction form
    2,638.74/3,955.76 = 1,251.21/x
  3. Step 3: Cross multiply
    2,638.74x = 3,955.76 × 1,251.21
  4. Step 4: Simplify right side
    2,638.74x = 4,949,486.47
  5. Step 5: Solve for x
    x = 4,949,486.47/2,638.74
  6. Step 6: Final answer
    x = 1,875.70

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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.