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Finding the Fourth Proportional to 274.80, 379.40 and 247.08

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Solution

The fourth proportional to 274.80, 379.40 and 247.08 is: 341.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.80 : 379.40 = 247.08 : x
  2. Step 2: Convert to fraction form
    274.80/379.40 = 247.08/x
  3. Step 3: Cross multiply
    274.80x = 379.40 × 247.08
  4. Step 4: Simplify right side
    274.80x = 93,742.15
  5. Step 5: Solve for x
    x = 93,742.15/274.80
  6. Step 6: Final answer
    x = 341.13

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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.