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Finding the Fourth Proportional to 679.34, 937.49 and 430.40

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Solution

The fourth proportional to 679.34, 937.49 and 430.40 is: 593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.34 : 937.49 = 430.40 : x
  2. Step 2: Convert to fraction form
    679.34/937.49 = 430.40/x
  3. Step 3: Cross multiply
    679.34x = 937.49 × 430.40
  4. Step 4: Simplify right side
    679.34x = 403,488.86
  5. Step 5: Solve for x
    x = 403,488.86/679.34
  6. Step 6: Final answer
    x = 593.95

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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.