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Finding the Fourth Proportional to 694.25, 1,041.54 and 617.79

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Solution

The fourth proportional to 694.25, 1,041.54 and 617.79 is: 926.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.25 : 1,041.54 = 617.79 : x
  2. Step 2: Convert to fraction form
    694.25/1,041.54 = 617.79/x
  3. Step 3: Cross multiply
    694.25x = 1,041.54 × 617.79
  4. Step 4: Simplify right side
    694.25x = 643,453.00
  5. Step 5: Solve for x
    x = 643,453.00/694.25
  6. Step 6: Final answer
    x = 926.83

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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.