Home / 2,587.06-3,880.57-639.27

Finding the Fourth Proportional to 2,587.06, 3,880.57 and 639.27

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Solution

The fourth proportional to 2,587.06, 3,880.57 and 639.27 is: 958.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.06 : 3,880.57 = 639.27 : x
  2. Step 2: Convert to fraction form
    2,587.06/3,880.57 = 639.27/x
  3. Step 3: Cross multiply
    2,587.06x = 3,880.57 × 639.27
  4. Step 4: Simplify right side
    2,587.06x = 2,480,731.98
  5. Step 5: Solve for x
    x = 2,480,731.98/2,587.06
  6. Step 6: Final answer
    x = 958.90

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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.