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Finding the Fourth Proportional to 373.91, 561.15 and 191.42

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Solution

The fourth proportional to 373.91, 561.15 and 191.42 is: 287.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    373.91 : 561.15 = 191.42 : x
  2. Step 2: Convert to fraction form
    373.91/561.15 = 191.42/x
  3. Step 3: Cross multiply
    373.91x = 561.15 × 191.42
  4. Step 4: Simplify right side
    373.91x = 107,412.53
  5. Step 5: Solve for x
    x = 107,412.53/373.91
  6. Step 6: Final answer
    x = 287.27

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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.