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Finding the Fourth Proportional to 5,787.79, 7,987.15 and 3,269.90

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Solution

The fourth proportional to 5,787.79, 7,987.15 and 3,269.90 is: 4,512.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,787.79 : 7,987.15 = 3,269.90 : x
  2. Step 2: Convert to fraction form
    5,787.79/7,987.15 = 3,269.90/x
  3. Step 3: Cross multiply
    5,787.79x = 7,987.15 × 3,269.90
  4. Step 4: Simplify right side
    5,787.79x = 26,117,193.58
  5. Step 5: Solve for x
    x = 26,117,193.58/5,787.79
  6. Step 6: Final answer
    x = 4,512.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.