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Finding the Fourth Proportional to 766.73, 1,057.85 and 471.89

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Solution

The fourth proportional to 766.73, 1,057.85 and 471.89 is: 651.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.73 : 1,057.85 = 471.89 : x
  2. Step 2: Convert to fraction form
    766.73/1,057.85 = 471.89/x
  3. Step 3: Cross multiply
    766.73x = 1,057.85 × 471.89
  4. Step 4: Simplify right side
    766.73x = 499,186.48
  5. Step 5: Solve for x
    x = 499,186.48/766.73
  6. Step 6: Final answer
    x = 651.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.