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Finding the Fourth Proportional to 617.49, 925.70 and 371.21

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Solution

The fourth proportional to 617.49, 925.70 and 371.21 is: 556.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.49 : 925.70 = 371.21 : x
  2. Step 2: Convert to fraction form
    617.49/925.70 = 371.21/x
  3. Step 3: Cross multiply
    617.49x = 925.70 × 371.21
  4. Step 4: Simplify right side
    617.49x = 343,622.61
  5. Step 5: Solve for x
    x = 343,622.61/617.49
  6. Step 6: Final answer
    x = 556.48

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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.