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Finding the Fourth Proportional to 210.59, 290.54 and 123.20

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Solution

The fourth proportional to 210.59, 290.54 and 123.20 is: 169.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.59 : 290.54 = 123.20 : x
  2. Step 2: Convert to fraction form
    210.59/290.54 = 123.20/x
  3. Step 3: Cross multiply
    210.59x = 290.54 × 123.20
  4. Step 4: Simplify right side
    210.59x = 35,793.38
  5. Step 5: Solve for x
    x = 35,793.38/210.59
  6. Step 6: Final answer
    x = 169.97

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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.