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Finding the Fourth Proportional to 1,008.57, 1,512.66 and 277.95

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Solution

The fourth proportional to 1,008.57, 1,512.66 and 277.95 is: 416.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.57 : 1,512.66 = 277.95 : x
  2. Step 2: Convert to fraction form
    1,008.57/1,512.66 = 277.95/x
  3. Step 3: Cross multiply
    1,008.57x = 1,512.66 × 277.95
  4. Step 4: Simplify right side
    1,008.57x = 420,443.85
  5. Step 5: Solve for x
    x = 420,443.85/1,008.57
  6. Step 6: Final answer
    x = 416.87

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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.