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Finding the Fourth Proportional to 210.35, 288.65 and 191.79

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Solution

The fourth proportional to 210.35, 288.65 and 191.79 is: 263.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.35 : 288.65 = 191.79 : x
  2. Step 2: Convert to fraction form
    210.35/288.65 = 191.79/x
  3. Step 3: Cross multiply
    210.35x = 288.65 × 191.79
  4. Step 4: Simplify right side
    210.35x = 55,360.66
  5. Step 5: Solve for x
    x = 55,360.66/210.35
  6. Step 6: Final answer
    x = 263.18

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.