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Finding the Fourth Proportional to 1,254.33, 1,880.51 and 863.15

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Solution

The fourth proportional to 1,254.33, 1,880.51 and 863.15 is: 1,294.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.33 : 1,880.51 = 863.15 : x
  2. Step 2: Convert to fraction form
    1,254.33/1,880.51 = 863.15/x
  3. Step 3: Cross multiply
    1,254.33x = 1,880.51 × 863.15
  4. Step 4: Simplify right side
    1,254.33x = 1,623,148.49
  5. Step 5: Solve for x
    x = 1,623,148.49/1,254.33
  6. Step 6: Final answer
    x = 1,294.04

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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.