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Finding the Fourth Proportional to 694.11, 1,040.01 and 488.31

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Solution

The fourth proportional to 694.11, 1,040.01 and 488.31 is: 731.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.11 : 1,040.01 = 488.31 : x
  2. Step 2: Convert to fraction form
    694.11/1,040.01 = 488.31/x
  3. Step 3: Cross multiply
    694.11x = 1,040.01 × 488.31
  4. Step 4: Simplify right side
    694.11x = 507,847.40
  5. Step 5: Solve for x
    x = 507,847.40/694.11
  6. Step 6: Final answer
    x = 731.65

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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.