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Finding the Fourth Proportional to 766.18, 1,147.08 and 475.66

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Solution

The fourth proportional to 766.18, 1,147.08 and 475.66 is: 712.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.18 : 1,147.08 = 475.66 : x
  2. Step 2: Convert to fraction form
    766.18/1,147.08 = 475.66/x
  3. Step 3: Cross multiply
    766.18x = 1,147.08 × 475.66
  4. Step 4: Simplify right side
    766.18x = 545,620.07
  5. Step 5: Solve for x
    x = 545,620.07/766.18
  6. Step 6: Final answer
    x = 712.13

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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.