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Finding the Fourth Proportional to 2,655.79, 3,978.26 and 1,264.92

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Solution

The fourth proportional to 2,655.79, 3,978.26 and 1,264.92 is: 1,894.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.79 : 3,978.26 = 1,264.92 : x
  2. Step 2: Convert to fraction form
    2,655.79/3,978.26 = 1,264.92/x
  3. Step 3: Cross multiply
    2,655.79x = 3,978.26 × 1,264.92
  4. Step 4: Simplify right side
    2,655.79x = 5,032,171.25
  5. Step 5: Solve for x
    x = 5,032,171.25/2,655.79
  6. Step 6: Final answer
    x = 1,894.79

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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.