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Finding the Fourth Proportional to 3,902.64, 5,853.89 and 1,129.20

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Solution

The fourth proportional to 3,902.64, 5,853.89 and 1,129.20 is: 1,693.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,902.64 : 5,853.89 = 1,129.20 : x
  2. Step 2: Convert to fraction form
    3,902.64/5,853.89 = 1,129.20/x
  3. Step 3: Cross multiply
    3,902.64x = 5,853.89 × 1,129.20
  4. Step 4: Simplify right side
    3,902.64x = 6,610,206.94
  5. Step 5: Solve for x
    x = 6,610,206.94/3,902.64
  6. Step 6: Final answer
    x = 1,693.78

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1.5x scale

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.