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Finding the Fourth Proportional to 2,887.56, 4,326.13 and 1,328.87

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Solution

The fourth proportional to 2,887.56, 4,326.13 and 1,328.87 is: 1,990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.56 : 4,326.13 = 1,328.87 : x
  2. Step 2: Convert to fraction form
    2,887.56/4,326.13 = 1,328.87/x
  3. Step 3: Cross multiply
    2,887.56x = 4,326.13 × 1,328.87
  4. Step 4: Simplify right side
    2,887.56x = 5,748,845.04
  5. Step 5: Solve for x
    x = 5,748,845.04/2,887.56
  6. Step 6: Final answer
    x = 1,990.90

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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.