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Finding the Fourth Proportional to 274.99, 379.49 and 156.95

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Solution

The fourth proportional to 274.99, 379.49 and 156.95 is: 216.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.99 : 379.49 = 156.95 : x
  2. Step 2: Convert to fraction form
    274.99/379.49 = 156.95/x
  3. Step 3: Cross multiply
    274.99x = 379.49 × 156.95
  4. Step 4: Simplify right side
    274.99x = 59,560.17
  5. Step 5: Solve for x
    x = 59,560.17/274.99
  6. Step 6: Final answer
    x = 216.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.