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Finding the Fourth Proportional to 766.66, 1,148.38 and 636.35

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Solution

The fourth proportional to 766.66, 1,148.38 and 636.35 is: 953.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.66 : 1,148.38 = 636.35 : x
  2. Step 2: Convert to fraction form
    766.66/1,148.38 = 636.35/x
  3. Step 3: Cross multiply
    766.66x = 1,148.38 × 636.35
  4. Step 4: Simplify right side
    766.66x = 730,771.61
  5. Step 5: Solve for x
    x = 730,771.61/766.66
  6. Step 6: Final answer
    x = 953.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.