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Finding the Fourth Proportional to 636.08, 947.26 and 619.76

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Solution

The fourth proportional to 636.08, 947.26 and 619.76 is: 922.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.08 : 947.26 = 619.76 : x
  2. Step 2: Convert to fraction form
    636.08/947.26 = 619.76/x
  3. Step 3: Cross multiply
    636.08x = 947.26 × 619.76
  4. Step 4: Simplify right side
    636.08x = 587,073.86
  5. Step 5: Solve for x
    x = 587,073.86/636.08
  6. Step 6: Final answer
    x = 922.96

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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.