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Finding the Fourth Proportional to 2,657.84, 3,987.24 and 879.00

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Solution

The fourth proportional to 2,657.84, 3,987.24 and 879.00 is: 1,318.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.84 : 3,987.24 = 879.00 : x
  2. Step 2: Convert to fraction form
    2,657.84/3,987.24 = 879.00/x
  3. Step 3: Cross multiply
    2,657.84x = 3,987.24 × 879.00
  4. Step 4: Simplify right side
    2,657.84x = 3,504,765.71
  5. Step 5: Solve for x
    x = 3,504,765.71/2,657.84
  6. Step 6: Final answer
    x = 1,318.65

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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.