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Finding the Fourth Proportional to 2,655.70, 3,982.02 and 1,011.20

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Solution

The fourth proportional to 2,655.70, 3,982.02 and 1,011.20 is: 1,516.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,655.70 : 3,982.02 = 1,011.20 : x
  2. Step 2: Convert to fraction form
    2,655.70/3,982.02 = 1,011.20/x
  3. Step 3: Cross multiply
    2,655.70x = 3,982.02 × 1,011.20
  4. Step 4: Simplify right side
    2,655.70x = 4,026,618.62
  5. Step 5: Solve for x
    x = 4,026,618.62/2,655.70
  6. Step 6: Final answer
    x = 1,516.22

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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.