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Finding the Fourth Proportional to 434.24, 650.90 and 331.30

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Solution

The fourth proportional to 434.24, 650.90 and 331.30 is: 496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.24 : 650.90 = 331.30 : x
  2. Step 2: Convert to fraction form
    434.24/650.90 = 331.30/x
  3. Step 3: Cross multiply
    434.24x = 650.90 × 331.30
  4. Step 4: Simplify right side
    434.24x = 215,643.17
  5. Step 5: Solve for x
    x = 215,643.17/434.24
  6. Step 6: Final answer
    x = 496.60

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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.