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Finding the Fourth Proportional to 679.12, 937.20 and 368.62

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Solution

The fourth proportional to 679.12, 937.20 and 368.62 is: 508.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.12 : 937.20 = 368.62 : x
  2. Step 2: Convert to fraction form
    679.12/937.20 = 368.62/x
  3. Step 3: Cross multiply
    679.12x = 937.20 × 368.62
  4. Step 4: Simplify right side
    679.12x = 345,470.66
  5. Step 5: Solve for x
    x = 345,470.66/679.12
  6. Step 6: Final answer
    x = 508.70

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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.