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Finding the Fourth Proportional to 315.81, 473.24 and 133.29

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Solution

The fourth proportional to 315.81, 473.24 and 133.29 is: 199.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.81 : 473.24 = 133.29 : x
  2. Step 2: Convert to fraction form
    315.81/473.24 = 133.29/x
  3. Step 3: Cross multiply
    315.81x = 473.24 × 133.29
  4. Step 4: Simplify right side
    315.81x = 63,078.49
  5. Step 5: Solve for x
    x = 63,078.49/315.81
  6. Step 6: Final answer
    x = 199.74

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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.