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Finding the Fourth Proportional to 371.16, 512.40 and 247.08

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Solution

The fourth proportional to 371.16, 512.40 and 247.08 is: 341.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.16 : 512.40 = 247.08 : x
  2. Step 2: Convert to fraction form
    371.16/512.40 = 247.08/x
  3. Step 3: Cross multiply
    371.16x = 512.40 × 247.08
  4. Step 4: Simplify right side
    371.16x = 126,603.79
  5. Step 5: Solve for x
    x = 126,603.79/371.16
  6. Step 6: Final answer
    x = 341.10

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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.