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Finding the Fourth Proportional to 370.11, 555.16 and 126.81

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Solution

The fourth proportional to 370.11, 555.16 and 126.81 is: 190.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.11 : 555.16 = 126.81 : x
  2. Step 2: Convert to fraction form
    370.11/555.16 = 126.81/x
  3. Step 3: Cross multiply
    370.11x = 555.16 × 126.81
  4. Step 4: Simplify right side
    370.11x = 70,399.84
  5. Step 5: Solve for x
    x = 70,399.84/370.11
  6. Step 6: Final answer
    x = 190.21

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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.