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Finding the Fourth Proportional to 435.21, 652.96 and 191.90

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Solution

The fourth proportional to 435.21, 652.96 and 191.90 is: 287.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.21 : 652.96 = 191.90 : x
  2. Step 2: Convert to fraction form
    435.21/652.96 = 191.90/x
  3. Step 3: Cross multiply
    435.21x = 652.96 × 191.90
  4. Step 4: Simplify right side
    435.21x = 125,304.90
  5. Step 5: Solve for x
    x = 125,304.90/435.21
  6. Step 6: Final answer
    x = 287.92

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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.