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Finding the Fourth Proportional to 315.80, 473.98 and 161.83

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Solution

The fourth proportional to 315.80, 473.98 and 161.83 is: 242.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.80 : 473.98 = 161.83 : x
  2. Step 2: Convert to fraction form
    315.80/473.98 = 161.83/x
  3. Step 3: Cross multiply
    315.80x = 473.98 × 161.83
  4. Step 4: Simplify right side
    315.80x = 76,704.18
  5. Step 5: Solve for x
    x = 76,704.18/315.80
  6. Step 6: Final answer
    x = 242.89

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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.