Home / 2,587.11-3,880.62-639.33

Finding the Fourth Proportional to 2,587.11, 3,880.62 and 639.33

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Solution

The fourth proportional to 2,587.11, 3,880.62 and 639.33 is: 958.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.11 : 3,880.62 = 639.33 : x
  2. Step 2: Convert to fraction form
    2,587.11/3,880.62 = 639.33/x
  3. Step 3: Cross multiply
    2,587.11x = 3,880.62 × 639.33
  4. Step 4: Simplify right side
    2,587.11x = 2,480,996.78
  5. Step 5: Solve for x
    x = 2,480,996.78/2,587.11
  6. Step 6: Final answer
    x = 958.98

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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.