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Finding the Fourth Proportional to 679.06, 937.40 and 430.38

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Solution

The fourth proportional to 679.06, 937.40 and 430.38 is: 594.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    679.06 : 937.40 = 430.38 : x
  2. Step 2: Convert to fraction form
    679.06/937.40 = 430.38/x
  3. Step 3: Cross multiply
    679.06x = 937.40 × 430.38
  4. Step 4: Simplify right side
    679.06x = 403,438.21
  5. Step 5: Solve for x
    x = 403,438.21/679.06
  6. Step 6: Final answer
    x = 594.11

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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.