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Finding the Fourth Proportional to 275.98, 380.85 and 151.63

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Solution

The fourth proportional to 275.98, 380.85 and 151.63 is: 209.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.98 : 380.85 = 151.63 : x
  2. Step 2: Convert to fraction form
    275.98/380.85 = 151.63/x
  3. Step 3: Cross multiply
    275.98x = 380.85 × 151.63
  4. Step 4: Simplify right side
    275.98x = 57,748.48
  5. Step 5: Solve for x
    x = 57,748.48/275.98
  6. Step 6: Final answer
    x = 209.25

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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.