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Finding the Fourth Proportional to 3,639.92, 5,459.92 and 1,042.88

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Solution

The fourth proportional to 3,639.92, 5,459.92 and 1,042.88 is: 1,564.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.92 : 5,459.92 = 1,042.88 : x
  2. Step 2: Convert to fraction form
    3,639.92/5,459.92 = 1,042.88/x
  3. Step 3: Cross multiply
    3,639.92x = 5,459.92 × 1,042.88
  4. Step 4: Simplify right side
    3,639.92x = 5,694,011.46
  5. Step 5: Solve for x
    x = 5,694,011.46/3,639.92
  6. Step 6: Final answer
    x = 1,564.33

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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.