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Finding the Fourth Proportional to 374.36, 561.20 and 191.35

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Solution

The fourth proportional to 374.36, 561.20 and 191.35 is: 286.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.36 : 561.20 = 191.35 : x
  2. Step 2: Convert to fraction form
    374.36/561.20 = 191.35/x
  3. Step 3: Cross multiply
    374.36x = 561.20 × 191.35
  4. Step 4: Simplify right side
    374.36x = 107,386.78
  5. Step 5: Solve for x
    x = 107,386.78/374.36
  6. Step 6: Final answer
    x = 286.85

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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.