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Finding the Fourth Proportional to 679.30, 937.38 and 384.55

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Solution

The fourth proportional to 679.30, 937.38 and 384.55 is: 530.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.30 : 937.38 = 384.55 : x
  2. Step 2: Convert to fraction form
    679.30/937.38 = 384.55/x
  3. Step 3: Cross multiply
    679.30x = 937.38 × 384.55
  4. Step 4: Simplify right side
    679.30x = 360,469.48
  5. Step 5: Solve for x
    x = 360,469.48/679.30
  6. Step 6: Final answer
    x = 530.65

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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.