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Finding the Fourth Proportional to 353.80, 530.70 and 191.48

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Solution

The fourth proportional to 353.80, 530.70 and 191.48 is: 287.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.80 : 530.70 = 191.48 : x
  2. Step 2: Convert to fraction form
    353.80/530.70 = 191.48/x
  3. Step 3: Cross multiply
    353.80x = 530.70 × 191.48
  4. Step 4: Simplify right side
    353.80x = 101,618.44
  5. Step 5: Solve for x
    x = 101,618.44/353.80
  6. Step 6: Final answer
    x = 287.22

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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.