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Finding the Fourth Proportional to 617.12, 925.38 and 343.40

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Solution

The fourth proportional to 617.12, 925.38 and 343.40 is: 514.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.12 : 925.38 = 343.40 : x
  2. Step 2: Convert to fraction form
    617.12/925.38 = 343.40/x
  3. Step 3: Cross multiply
    617.12x = 925.38 × 343.40
  4. Step 4: Simplify right side
    617.12x = 317,775.49
  5. Step 5: Solve for x
    x = 317,775.49/617.12
  6. Step 6: Final answer
    x = 514.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.