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Finding the Fourth Proportional to 383.49, 575.15 and 188.40

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Solution

The fourth proportional to 383.49, 575.15 and 188.40 is: 282.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.49 : 575.15 = 188.40 : x
  2. Step 2: Convert to fraction form
    383.49/575.15 = 188.40/x
  3. Step 3: Cross multiply
    383.49x = 575.15 × 188.40
  4. Step 4: Simplify right side
    383.49x = 108,357.32
  5. Step 5: Solve for x
    x = 108,357.32/383.49
  6. Step 6: Final answer
    x = 282.56

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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.