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Finding the Fourth Proportional to 5,787.96, 7,987.78 and 3,269.20

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Solution

The fourth proportional to 5,787.96, 7,987.78 and 3,269.20 is: 4,511.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,787.96 : 7,987.78 = 3,269.20 : x
  2. Step 2: Convert to fraction form
    5,787.96/7,987.78 = 3,269.20/x
  3. Step 3: Cross multiply
    5,787.96x = 7,987.78 × 3,269.20
  4. Step 4: Simplify right side
    5,787.96x = 26,113,650.38
  5. Step 5: Solve for x
    x = 26,113,650.38/5,787.96
  6. Step 6: Final answer
    x = 4,511.72

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1.5x scale

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.