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Finding the Fourth Proportional to 636.96, 882.75 and 618.33

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Solution

The fourth proportional to 636.96, 882.75 and 618.33 is: 856.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.96 : 882.75 = 618.33 : x
  2. Step 2: Convert to fraction form
    636.96/882.75 = 618.33/x
  3. Step 3: Cross multiply
    636.96x = 882.75 × 618.33
  4. Step 4: Simplify right side
    636.96x = 545,830.81
  5. Step 5: Solve for x
    x = 545,830.81/636.96
  6. Step 6: Final answer
    x = 856.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.