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Finding the Fourth Proportional to 766.71, 1,057.62 and 471.92

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Solution

The fourth proportional to 766.71, 1,057.62 and 471.92 is: 650.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.71 : 1,057.62 = 471.92 : x
  2. Step 2: Convert to fraction form
    766.71/1,057.62 = 471.92/x
  3. Step 3: Cross multiply
    766.71x = 1,057.62 × 471.92
  4. Step 4: Simplify right side
    766.71x = 499,108.51
  5. Step 5: Solve for x
    x = 499,108.51/766.71
  6. Step 6: Final answer
    x = 650.97

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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.