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Finding the Fourth Proportional to 434.70, 651.42 and 218.52

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Solution

The fourth proportional to 434.70, 651.42 and 218.52 is: 327.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.70 : 651.42 = 218.52 : x
  2. Step 2: Convert to fraction form
    434.70/651.42 = 218.52/x
  3. Step 3: Cross multiply
    434.70x = 651.42 × 218.52
  4. Step 4: Simplify right side
    434.70x = 142,348.30
  5. Step 5: Solve for x
    x = 142,348.30/434.70
  6. Step 6: Final answer
    x = 327.46

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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.