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Finding the Fourth Proportional to 218.98, 328.06 and 127.51

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Solution

The fourth proportional to 218.98, 328.06 and 127.51 is: 191.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    218.98 : 328.06 = 127.51 : x
  2. Step 2: Convert to fraction form
    218.98/328.06 = 127.51/x
  3. Step 3: Cross multiply
    218.98x = 328.06 × 127.51
  4. Step 4: Simplify right side
    218.98x = 41,828.65
  5. Step 5: Solve for x
    x = 41,828.65/218.98
  6. Step 6: Final answer
    x = 191.02

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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.