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Finding the Fourth Proportional to 210.43, 315.57 and 107.83

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Solution

The fourth proportional to 210.43, 315.57 and 107.83 is: 161.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.43 : 315.57 = 107.83 : x
  2. Step 2: Convert to fraction form
    210.43/315.57 = 107.83/x
  3. Step 3: Cross multiply
    210.43x = 315.57 × 107.83
  4. Step 4: Simplify right side
    210.43x = 34,026.34
  5. Step 5: Solve for x
    x = 34,026.34/210.43
  6. Step 6: Final answer
    x = 161.70

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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.