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Finding the Fourth Proportional to 2,642.30, 3,964.14 and 998.87

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Solution

The fourth proportional to 2,642.30, 3,964.14 and 998.87 is: 1,498.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.30 : 3,964.14 = 998.87 : x
  2. Step 2: Convert to fraction form
    2,642.30/3,964.14 = 998.87/x
  3. Step 3: Cross multiply
    2,642.30x = 3,964.14 × 998.87
  4. Step 4: Simplify right side
    2,642.30x = 3,959,660.52
  5. Step 5: Solve for x
    x = 3,959,660.52/2,642.30
  6. Step 6: Final answer
    x = 1,498.57

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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.