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Finding the Fourth Proportional to 265.31, 366.05 and 154.78

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Solution

The fourth proportional to 265.31, 366.05 and 154.78 is: 213.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    265.31 : 366.05 = 154.78 : x
  2. Step 2: Convert to fraction form
    265.31/366.05 = 154.78/x
  3. Step 3: Cross multiply
    265.31x = 366.05 × 154.78
  4. Step 4: Simplify right side
    265.31x = 56,657.22
  5. Step 5: Solve for x
    x = 56,657.22/265.31
  6. Step 6: Final answer
    x = 213.55

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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.