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Finding the Fourth Proportional to 2,187.10, 3,280.87 and 954.62

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Solution

The fourth proportional to 2,187.10, 3,280.87 and 954.62 is: 1,432.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.10 : 3,280.87 = 954.62 : x
  2. Step 2: Convert to fraction form
    2,187.10/3,280.87 = 954.62/x
  3. Step 3: Cross multiply
    2,187.10x = 3,280.87 × 954.62
  4. Step 4: Simplify right side
    2,187.10x = 3,131,981.21
  5. Step 5: Solve for x
    x = 3,131,981.21/2,187.10
  6. Step 6: Final answer
    x = 1,432.02

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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.