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Finding the Fourth Proportional to 318.81, 477.02 and 188.85

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Solution

The fourth proportional to 318.81, 477.02 and 188.85 is: 282.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.81 : 477.02 = 188.85 : x
  2. Step 2: Convert to fraction form
    318.81/477.02 = 188.85/x
  3. Step 3: Cross multiply
    318.81x = 477.02 × 188.85
  4. Step 4: Simplify right side
    318.81x = 90,085.23
  5. Step 5: Solve for x
    x = 90,085.23/318.81
  6. Step 6: Final answer
    x = 282.57

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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.