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Finding the Fourth Proportional to 679.38, 937.32 and 417.48

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Solution

The fourth proportional to 679.38, 937.32 and 417.48 is: 575.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.38 : 937.32 = 417.48 : x
  2. Step 2: Convert to fraction form
    679.38/937.32 = 417.48/x
  3. Step 3: Cross multiply
    679.38x = 937.32 × 417.48
  4. Step 4: Simplify right side
    679.38x = 391,312.35
  5. Step 5: Solve for x
    x = 391,312.35/679.38
  6. Step 6: Final answer
    x = 575.98

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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.