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Finding the Fourth Proportional to 3,502.89, 5,254.35 and 905.85

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Solution

The fourth proportional to 3,502.89, 5,254.35 and 905.85 is: 1,358.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,502.89 : 5,254.35 = 905.85 : x
  2. Step 2: Convert to fraction form
    3,502.89/5,254.35 = 905.85/x
  3. Step 3: Cross multiply
    3,502.89x = 5,254.35 × 905.85
  4. Step 4: Simplify right side
    3,502.89x = 4,759,652.95
  5. Step 5: Solve for x
    x = 4,759,652.95/3,502.89
  6. Step 6: Final answer
    x = 1,358.78

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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.