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Finding the Fourth Proportional to 679.61, 937.86 and 369.11

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Solution

The fourth proportional to 679.61, 937.86 and 369.11 is: 509.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.61 : 937.86 = 369.11 : x
  2. Step 2: Convert to fraction form
    679.61/937.86 = 369.11/x
  3. Step 3: Cross multiply
    679.61x = 937.86 × 369.11
  4. Step 4: Simplify right side
    679.61x = 346,173.50
  5. Step 5: Solve for x
    x = 346,173.50/679.61
  6. Step 6: Final answer
    x = 509.37

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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.