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Finding the Fourth Proportional to 370.77, 555.98 and 127.23

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Solution

The fourth proportional to 370.77, 555.98 and 127.23 is: 190.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.77 : 555.98 = 127.23 : x
  2. Step 2: Convert to fraction form
    370.77/555.98 = 127.23/x
  3. Step 3: Cross multiply
    370.77x = 555.98 × 127.23
  4. Step 4: Simplify right side
    370.77x = 70,736.70
  5. Step 5: Solve for x
    x = 70,736.70/370.77
  6. Step 6: Final answer
    x = 190.78

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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.