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Finding the Fourth Proportional to 679.62, 937.89 and 417.54

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Solution

The fourth proportional to 679.62, 937.89 and 417.54 is: 576.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.62 : 937.89 = 417.54 : x
  2. Step 2: Convert to fraction form
    679.62/937.89 = 417.54/x
  3. Step 3: Cross multiply
    679.62x = 937.89 × 417.54
  4. Step 4: Simplify right side
    679.62x = 391,606.59
  5. Step 5: Solve for x
    x = 391,606.59/679.62
  6. Step 6: Final answer
    x = 576.21

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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.