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Finding the Fourth Proportional to 383.66, 575.48 and 127.16

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Solution

The fourth proportional to 383.66, 575.48 and 127.16 is: 190.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.66 : 575.48 = 127.16 : x
  2. Step 2: Convert to fraction form
    383.66/575.48 = 127.16/x
  3. Step 3: Cross multiply
    383.66x = 575.48 × 127.16
  4. Step 4: Simplify right side
    383.66x = 73,178.04
  5. Step 5: Solve for x
    x = 73,178.04/383.66
  6. Step 6: Final answer
    x = 190.74

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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.