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Finding the Fourth Proportional to 318.34, 477.53 and 135.71

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Solution

The fourth proportional to 318.34, 477.53 and 135.71 is: 203.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.34 : 477.53 = 135.71 : x
  2. Step 2: Convert to fraction form
    318.34/477.53 = 135.71/x
  3. Step 3: Cross multiply
    318.34x = 477.53 × 135.71
  4. Step 4: Simplify right side
    318.34x = 64,805.60
  5. Step 5: Solve for x
    x = 64,805.60/318.34
  6. Step 6: Final answer
    x = 203.57

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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.