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Finding the Fourth Proportional to 766.13, 1,057.73 and 471.80

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Solution

The fourth proportional to 766.13, 1,057.73 and 471.80 is: 651.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.13 : 1,057.73 = 471.80 : x
  2. Step 2: Convert to fraction form
    766.13/1,057.73 = 471.80/x
  3. Step 3: Cross multiply
    766.13x = 1,057.73 × 471.80
  4. Step 4: Simplify right side
    766.13x = 499,038.31
  5. Step 5: Solve for x
    x = 499,038.31/766.13
  6. Step 6: Final answer
    x = 651.37

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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.