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Finding the Fourth Proportional to 207.80, 285.99 and 191.10

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Solution

The fourth proportional to 207.80, 285.99 and 191.10 is: 263.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    207.80 : 285.99 = 191.10 : x
  2. Step 2: Convert to fraction form
    207.80/285.99 = 191.10/x
  3. Step 3: Cross multiply
    207.80x = 285.99 × 191.10
  4. Step 4: Simplify right side
    207.80x = 54,652.69
  5. Step 5: Solve for x
    x = 54,652.69/207.80
  6. Step 6: Final answer
    x = 263.01

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.