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Finding the Fourth Proportional to 2,289.90, 3,432.96 and 902.64

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Solution

The fourth proportional to 2,289.90, 3,432.96 and 902.64 is: 1,353.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,289.90 : 3,432.96 = 902.64 : x
  2. Step 2: Convert to fraction form
    2,289.90/3,432.96 = 902.64/x
  3. Step 3: Cross multiply
    2,289.90x = 3,432.96 × 902.64
  4. Step 4: Simplify right side
    2,289.90x = 3,098,727.01
  5. Step 5: Solve for x
    x = 3,098,727.01/2,289.90
  6. Step 6: Final answer
    x = 1,353.21

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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.