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Finding the Fourth Proportional to 635.24, 953.78 and 391.03

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Solution

The fourth proportional to 635.24, 953.78 and 391.03 is: 587.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    635.24 : 953.78 = 391.03 : x
  2. Step 2: Convert to fraction form
    635.24/953.78 = 391.03/x
  3. Step 3: Cross multiply
    635.24x = 953.78 × 391.03
  4. Step 4: Simplify right side
    635.24x = 372,952.25
  5. Step 5: Solve for x
    x = 372,952.25/635.24
  6. Step 6: Final answer
    x = 587.10

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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.