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Finding the Fourth Proportional to 210.46, 290.49 and 123.15

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Solution

The fourth proportional to 210.46, 290.49 and 123.15 is: 169.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.46 : 290.49 = 123.15 : x
  2. Step 2: Convert to fraction form
    210.46/290.49 = 123.15/x
  3. Step 3: Cross multiply
    210.46x = 290.49 × 123.15
  4. Step 4: Simplify right side
    210.46x = 35,773.84
  5. Step 5: Solve for x
    x = 35,773.84/210.46
  6. Step 6: Final answer
    x = 169.98

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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.