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Finding the Fourth Proportional to 2,888.24, 4,331.44 and 940

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Solution

The fourth proportional to 2,888.24, 4,331.44 and 940 is: 1,409.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,888.24 : 4,331.44 = 940 : x
  2. Step 2: Convert to fraction form
    2,888.24/4,331.44 = 940/x
  3. Step 3: Cross multiply
    2,888.24x = 4,331.44 × 940
  4. Step 4: Simplify right side
    2,888.24x = 4,071,553.60
  5. Step 5: Solve for x
    x = 4,071,553.60/2,888.24
  6. Step 6: Final answer
    x = 1,409.70

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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.