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Finding the Fourth Proportional to 3,859.72, 5,789.56 and 938.04

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Solution

The fourth proportional to 3,859.72, 5,789.56 and 938.04 is: 1,407.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.72 : 5,789.56 = 938.04 : x
  2. Step 2: Convert to fraction form
    3,859.72/5,789.56 = 938.04/x
  3. Step 3: Cross multiply
    3,859.72x = 5,789.56 × 938.04
  4. Step 4: Simplify right side
    3,859.72x = 5,430,838.86
  5. Step 5: Solve for x
    x = 5,430,838.86/3,859.72
  6. Step 6: Final answer
    x = 1,407.06

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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.