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Finding the Fourth Proportional to 2,400.28, 3,600.45 and 861.28

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Solution

The fourth proportional to 2,400.28, 3,600.45 and 861.28 is: 1,291.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,400.28 : 3,600.45 = 861.28 : x
  2. Step 2: Convert to fraction form
    2,400.28/3,600.45 = 861.28/x
  3. Step 3: Cross multiply
    2,400.28x = 3,600.45 × 861.28
  4. Step 4: Simplify right side
    2,400.28x = 3,100,995.58
  5. Step 5: Solve for x
    x = 3,100,995.58/2,400.28
  6. Step 6: Final answer
    x = 1,291.93

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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.