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Finding the Fourth Proportional to 461.26, 690.67 and 403.21

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Solution

The fourth proportional to 461.26, 690.67 and 403.21 is: 603.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.26 : 690.67 = 403.21 : x
  2. Step 2: Convert to fraction form
    461.26/690.67 = 403.21/x
  3. Step 3: Cross multiply
    461.26x = 690.67 × 403.21
  4. Step 4: Simplify right side
    461.26x = 278,485.05
  5. Step 5: Solve for x
    x = 278,485.05/461.26
  6. Step 6: Final answer
    x = 603.75

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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.