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Finding the Fourth Proportional to 2,948.49, 4,422.07 and 868.64

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Solution

The fourth proportional to 2,948.49, 4,422.07 and 868.64 is: 1,302.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,948.49 : 4,422.07 = 868.64 : x
  2. Step 2: Convert to fraction form
    2,948.49/4,422.07 = 868.64/x
  3. Step 3: Cross multiply
    2,948.49x = 4,422.07 × 868.64
  4. Step 4: Simplify right side
    2,948.49x = 3,841,160.43
  5. Step 5: Solve for x
    x = 3,841,160.43/2,948.49
  6. Step 6: Final answer
    x = 1,302.76

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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.