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Finding the Fourth Proportional to 264.80, 399.20 and 250.40

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Solution

The fourth proportional to 264.80, 399.20 and 250.40 is: 377.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.80 : 399.20 = 250.40 : x
  2. Step 2: Convert to fraction form
    264.80/399.20 = 250.40/x
  3. Step 3: Cross multiply
    264.80x = 399.20 × 250.40
  4. Step 4: Simplify right side
    264.80x = 99,959.68
  5. Step 5: Solve for x
    x = 99,959.68/264.80
  6. Step 6: Final answer
    x = 377.49

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.