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Finding the Fourth Proportional to 310.05, 462.78 and 275.49

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Solution

The fourth proportional to 310.05, 462.78 and 275.49 is: 411.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.05 : 462.78 = 275.49 : x
  2. Step 2: Convert to fraction form
    310.05/462.78 = 275.49/x
  3. Step 3: Cross multiply
    310.05x = 462.78 × 275.49
  4. Step 4: Simplify right side
    310.05x = 127,491.26
  5. Step 5: Solve for x
    x = 127,491.26/310.05
  6. Step 6: Final answer
    x = 411.20

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.