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Finding the Fourth Proportional to 310.97, 428.88 and 264.47

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Solution

The fourth proportional to 310.97, 428.88 and 264.47 is: 364.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    310.97 : 428.88 = 264.47 : x
  2. Step 2: Convert to fraction form
    310.97/428.88 = 264.47/x
  3. Step 3: Cross multiply
    310.97x = 428.88 × 264.47
  4. Step 4: Simplify right side
    310.97x = 113,423.75
  5. Step 5: Solve for x
    x = 113,423.75/310.97
  6. Step 6: Final answer
    x = 364.75

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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.