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Finding the Fourth Proportional to 3,887.62, 5,832.78 and 1,290.76

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Solution

The fourth proportional to 3,887.62, 5,832.78 and 1,290.76 is: 1,936.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.62 : 5,832.78 = 1,290.76 : x
  2. Step 2: Convert to fraction form
    3,887.62/5,832.78 = 1,290.76/x
  3. Step 3: Cross multiply
    3,887.62x = 5,832.78 × 1,290.76
  4. Step 4: Simplify right side
    3,887.62x = 7,528,719.11
  5. Step 5: Solve for x
    x = 7,528,719.11/3,887.62
  6. Step 6: Final answer
    x = 1,936.59

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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.