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Finding the Fourth Proportional to 371.76, 512.78 and 240.74

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Solution

The fourth proportional to 371.76, 512.78 and 240.74 is: 332.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.76 : 512.78 = 240.74 : x
  2. Step 2: Convert to fraction form
    371.76/512.78 = 240.74/x
  3. Step 3: Cross multiply
    371.76x = 512.78 × 240.74
  4. Step 4: Simplify right side
    371.76x = 123,442.89
  5. Step 5: Solve for x
    x = 123,442.89/371.76
  6. Step 6: Final answer
    x = 332.05

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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.