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Finding the Fourth Proportional to 694.31, 1,040.77 and 571.29

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Solution

The fourth proportional to 694.31, 1,040.77 and 571.29 is: 856.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.31 : 1,040.77 = 571.29 : x
  2. Step 2: Convert to fraction form
    694.31/1,040.77 = 571.29/x
  3. Step 3: Cross multiply
    694.31x = 1,040.77 × 571.29
  4. Step 4: Simplify right side
    694.31x = 594,581.49
  5. Step 5: Solve for x
    x = 594,581.49/694.31
  6. Step 6: Final answer
    x = 856.36

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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.