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Finding the Fourth Proportional to 210.32, 290.24 and 151.42

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Solution

The fourth proportional to 210.32, 290.24 and 151.42 is: 208.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.32 : 290.24 = 151.42 : x
  2. Step 2: Convert to fraction form
    210.32/290.24 = 151.42/x
  3. Step 3: Cross multiply
    210.32x = 290.24 × 151.42
  4. Step 4: Simplify right side
    210.32x = 43,948.14
  5. Step 5: Solve for x
    x = 43,948.14/210.32
  6. Step 6: Final answer
    x = 208.96

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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.