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Finding the Fourth Proportional to 370.99, 556.54 and 136.74

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Solution

The fourth proportional to 370.99, 556.54 and 136.74 is: 205.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.99 : 556.54 = 136.74 : x
  2. Step 2: Convert to fraction form
    370.99/556.54 = 136.74/x
  3. Step 3: Cross multiply
    370.99x = 556.54 × 136.74
  4. Step 4: Simplify right side
    370.99x = 76,098.85
  5. Step 5: Solve for x
    x = 76,098.85/370.99
  6. Step 6: Final answer
    x = 205.12

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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.