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Finding the Fourth Proportional to 434.67, 652.47 and 218.25

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Solution

The fourth proportional to 434.67, 652.47 and 218.25 is: 327.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.67 : 652.47 = 218.25 : x
  2. Step 2: Convert to fraction form
    434.67/652.47 = 218.25/x
  3. Step 3: Cross multiply
    434.67x = 652.47 × 218.25
  4. Step 4: Simplify right side
    434.67x = 142,400.76
  5. Step 5: Solve for x
    x = 142,400.76/434.67
  6. Step 6: Final answer
    x = 327.61

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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.