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Finding the Fourth Proportional to 210.65, 290.75 and 144.23

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Solution

The fourth proportional to 210.65, 290.75 and 144.23 is: 199.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.65 : 290.75 = 144.23 : x
  2. Step 2: Convert to fraction form
    210.65/290.75 = 144.23/x
  3. Step 3: Cross multiply
    210.65x = 290.75 × 144.23
  4. Step 4: Simplify right side
    210.65x = 41,934.87
  5. Step 5: Solve for x
    x = 41,934.87/210.65
  6. Step 6: Final answer
    x = 199.07

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.