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Finding the Fourth Proportional to 434.86, 652.29 and 218.39

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Solution

The fourth proportional to 434.86, 652.29 and 218.39 is: 327.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.86 : 652.29 = 218.39 : x
  2. Step 2: Convert to fraction form
    434.86/652.29 = 218.39/x
  3. Step 3: Cross multiply
    434.86x = 652.29 × 218.39
  4. Step 4: Simplify right side
    434.86x = 142,453.61
  5. Step 5: Solve for x
    x = 142,453.61/434.86
  6. Step 6: Final answer
    x = 327.59

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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.