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Finding the Fourth Proportional to 210.40, 315.32 and 107.59

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Solution

The fourth proportional to 210.40, 315.32 and 107.59 is: 161.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.40 : 315.32 = 107.59 : x
  2. Step 2: Convert to fraction form
    210.40/315.32 = 107.59/x
  3. Step 3: Cross multiply
    210.40x = 315.32 × 107.59
  4. Step 4: Simplify right side
    210.40x = 33,924.74
  5. Step 5: Solve for x
    x = 33,924.74/210.40
  6. Step 6: Final answer
    x = 161.24

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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.