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Finding the Fourth Proportional to 679.38, 937.55 and 368.88

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Solution

The fourth proportional to 679.38, 937.55 and 368.88 is: 509.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.38 : 937.55 = 368.88 : x
  2. Step 2: Convert to fraction form
    679.38/937.55 = 368.88/x
  3. Step 3: Cross multiply
    679.38x = 937.55 × 368.88
  4. Step 4: Simplify right side
    679.38x = 345,843.44
  5. Step 5: Solve for x
    x = 345,843.44/679.38
  6. Step 6: Final answer
    x = 509.06

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1.5x scale

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.