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Finding the Fourth Proportional to 636.06, 948.90 and 618.42

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Solution

The fourth proportional to 636.06, 948.90 and 618.42 is: 922.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.06 : 948.90 = 618.42 : x
  2. Step 2: Convert to fraction form
    636.06/948.90 = 618.42/x
  3. Step 3: Cross multiply
    636.06x = 948.90 × 618.42
  4. Step 4: Simplify right side
    636.06x = 586,818.74
  5. Step 5: Solve for x
    x = 586,818.74/636.06
  6. Step 6: Final answer
    x = 922.58

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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.