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Finding the Fourth Proportional to 679.18, 937.44 and 430.39

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Solution

The fourth proportional to 679.18, 937.44 and 430.39 is: 594.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.18 : 937.44 = 430.39 : x
  2. Step 2: Convert to fraction form
    679.18/937.44 = 430.39/x
  3. Step 3: Cross multiply
    679.18x = 937.44 × 430.39
  4. Step 4: Simplify right side
    679.18x = 403,464.80
  5. Step 5: Solve for x
    x = 403,464.80/679.18
  6. Step 6: Final answer
    x = 594.05

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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.