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Finding the Fourth Proportional to 3,255.40, 4,875.90 and 2,679.40

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Solution

The fourth proportional to 3,255.40, 4,875.90 and 2,679.40 is: 4,013.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,255.40 : 4,875.90 = 2,679.40 : x
  2. Step 2: Convert to fraction form
    3,255.40/4,875.90 = 2,679.40/x
  3. Step 3: Cross multiply
    3,255.40x = 4,875.90 × 2,679.40
  4. Step 4: Simplify right side
    3,255.40x = 13,064,486.46
  5. Step 5: Solve for x
    x = 13,064,486.46/3,255.40
  6. Step 6: Final answer
    x = 4,013.17

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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.