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Finding the Fourth Proportional to 435.45, 652.15 and 218.50

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Solution

The fourth proportional to 435.45, 652.15 and 218.50 is: 327.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.45 : 652.15 = 218.50 : x
  2. Step 2: Convert to fraction form
    435.45/652.15 = 218.50/x
  3. Step 3: Cross multiply
    435.45x = 652.15 × 218.50
  4. Step 4: Simplify right side
    435.45x = 142,494.78
  5. Step 5: Solve for x
    x = 142,494.78/435.45
  6. Step 6: Final answer
    x = 327.24

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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.