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Finding the Fourth Proportional to 679.22, 937.31 and 384.48

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Solution

The fourth proportional to 679.22, 937.31 and 384.48 is: 530.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.22 : 937.31 = 384.48 : x
  2. Step 2: Convert to fraction form
    679.22/937.31 = 384.48/x
  3. Step 3: Cross multiply
    679.22x = 937.31 × 384.48
  4. Step 4: Simplify right side
    679.22x = 360,372.26
  5. Step 5: Solve for x
    x = 360,372.26/679.22
  6. Step 6: Final answer
    x = 530.57

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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.