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Finding the Fourth Proportional to 3,792.72, 5,679.36 and 3,248.40

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Solution

The fourth proportional to 3,792.72, 5,679.36 and 3,248.40 is: 4,864.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,792.72 : 5,679.36 = 3,248.40 : x
  2. Step 2: Convert to fraction form
    3,792.72/5,679.36 = 3,248.40/x
  3. Step 3: Cross multiply
    3,792.72x = 5,679.36 × 3,248.40
  4. Step 4: Simplify right side
    3,792.72x = 18,448,833.02
  5. Step 5: Solve for x
    x = 18,448,833.02/3,792.72
  6. Step 6: Final answer
    x = 4,864.27

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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.