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Finding the Fourth Proportional to 234.09, 322.80 and 151.20

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Solution

The fourth proportional to 234.09, 322.80 and 151.20 is: 208.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    234.09 : 322.80 = 151.20 : x
  2. Step 2: Convert to fraction form
    234.09/322.80 = 151.20/x
  3. Step 3: Cross multiply
    234.09x = 322.80 × 151.20
  4. Step 4: Simplify right side
    234.09x = 48,807.36
  5. Step 5: Solve for x
    x = 48,807.36/234.09
  6. Step 6: Final answer
    x = 208.50

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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.