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Finding the Fourth Proportional to 2,887.54, 4,331.76 and 939.29

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Solution

The fourth proportional to 2,887.54, 4,331.76 and 939.29 is: 1,409.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.54 : 4,331.76 = 939.29 : x
  2. Step 2: Convert to fraction form
    2,887.54/4,331.76 = 939.29/x
  3. Step 3: Cross multiply
    2,887.54x = 4,331.76 × 939.29
  4. Step 4: Simplify right side
    2,887.54x = 4,068,757.19
  5. Step 5: Solve for x
    x = 4,068,757.19/2,887.54
  6. Step 6: Final answer
    x = 1,409.08

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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.