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Finding the Fourth Proportional to 1,254.28, 1,880.86 and 388.52

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Solution

The fourth proportional to 1,254.28, 1,880.86 and 388.52 is: 582.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.28 : 1,880.86 = 388.52 : x
  2. Step 2: Convert to fraction form
    1,254.28/1,880.86 = 388.52/x
  3. Step 3: Cross multiply
    1,254.28x = 1,880.86 × 388.52
  4. Step 4: Simplify right side
    1,254.28x = 730,751.73
  5. Step 5: Solve for x
    x = 730,751.73/1,254.28
  6. Step 6: Final answer
    x = 582.61

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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.