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Finding the Fourth Proportional to 370.23, 555.21 and 126.69

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Solution

The fourth proportional to 370.23, 555.21 and 126.69 is: 189.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.23 : 555.21 = 126.69 : x
  2. Step 2: Convert to fraction form
    370.23/555.21 = 126.69/x
  3. Step 3: Cross multiply
    370.23x = 555.21 × 126.69
  4. Step 4: Simplify right side
    370.23x = 70,338.92
  5. Step 5: Solve for x
    x = 70,338.92/370.23
  6. Step 6: Final answer
    x = 189.99

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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.