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Finding the Fourth Proportional to 318.13, 477.36 and 194.40

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Solution

The fourth proportional to 318.13, 477.36 and 194.40 is: 291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.13 : 477.36 = 194.40 : x
  2. Step 2: Convert to fraction form
    318.13/477.36 = 194.40/x
  3. Step 3: Cross multiply
    318.13x = 477.36 × 194.40
  4. Step 4: Simplify right side
    318.13x = 92,798.78
  5. Step 5: Solve for x
    x = 92,798.78/318.13
  6. Step 6: Final answer
    x = 291.70

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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.