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Finding the Fourth Proportional to 639.56, 952.02 and 609.69

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Solution

The fourth proportional to 639.56, 952.02 and 609.69 is: 907.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.56 : 952.02 = 609.69 : x
  2. Step 2: Convert to fraction form
    639.56/952.02 = 609.69/x
  3. Step 3: Cross multiply
    639.56x = 952.02 × 609.69
  4. Step 4: Simplify right side
    639.56x = 580,440.64
  5. Step 5: Solve for x
    x = 580,440.64/639.56
  6. Step 6: Final answer
    x = 907.56

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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.