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Finding the Fourth Proportional to 635.51, 951.89 and 391.30

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Solution

The fourth proportional to 635.51, 951.89 and 391.30 is: 586.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.51 : 951.89 = 391.30 : x
  2. Step 2: Convert to fraction form
    635.51/951.89 = 391.30/x
  3. Step 3: Cross multiply
    635.51x = 951.89 × 391.30
  4. Step 4: Simplify right side
    635.51x = 372,470.22
  5. Step 5: Solve for x
    x = 372,470.22/635.51
  6. Step 6: Final answer
    x = 586.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.