Home / 2,488.21-3,732.08-639.28

Finding the Fourth Proportional to 2,488.21, 3,732.08 and 639.28

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Solution

The fourth proportional to 2,488.21, 3,732.08 and 639.28 is: 958.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,488.21 : 3,732.08 = 639.28 : x
  2. Step 2: Convert to fraction form
    2,488.21/3,732.08 = 639.28/x
  3. Step 3: Cross multiply
    2,488.21x = 3,732.08 × 639.28
  4. Step 4: Simplify right side
    2,488.21x = 2,385,844.10
  5. Step 5: Solve for x
    x = 2,385,844.10/2,488.21
  6. Step 6: Final answer
    x = 958.86

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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.