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Finding the Fourth Proportional to 4,165, 6,247.86 and 1,087

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Solution

The fourth proportional to 4,165, 6,247.86 and 1,087 is: 1,630.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,165 : 6,247.86 = 1,087 : x
  2. Step 2: Convert to fraction form
    4,165/6,247.86 = 1,087/x
  3. Step 3: Cross multiply
    4,165x = 6,247.86 × 1,087
  4. Step 4: Simplify right side
    4,165x = 6,791,423.82
  5. Step 5: Solve for x
    x = 6,791,423.82/4,165
  6. Step 6: Final answer
    x = 1,630.59

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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.