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Finding the Fourth Proportional to 2,587.92, 3,881.88 and 640.10

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Solution

The fourth proportional to 2,587.92, 3,881.88 and 640.10 is: 960.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,587.92 : 3,881.88 = 640.10 : x
  2. Step 2: Convert to fraction form
    2,587.92/3,881.88 = 640.10/x
  3. Step 3: Cross multiply
    2,587.92x = 3,881.88 × 640.10
  4. Step 4: Simplify right side
    2,587.92x = 2,484,791.39
  5. Step 5: Solve for x
    x = 2,484,791.39/2,587.92
  6. Step 6: Final answer
    x = 960.15

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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.