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Finding the Fourth Proportional to 639.26, 951.22 and 637.10

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Solution

The fourth proportional to 639.26, 951.22 and 637.10 is: 948.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.26 : 951.22 = 637.10 : x
  2. Step 2: Convert to fraction form
    639.26/951.22 = 637.10/x
  3. Step 3: Cross multiply
    639.26x = 951.22 × 637.10
  4. Step 4: Simplify right side
    639.26x = 606,022.26
  5. Step 5: Solve for x
    x = 606,022.26/639.26
  6. Step 6: Final answer
    x = 948.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.