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Finding the Fourth Proportional to 407.69, 611.80 and 151.19

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Solution

The fourth proportional to 407.69, 611.80 and 151.19 is: 226.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.69 : 611.80 = 151.19 : x
  2. Step 2: Convert to fraction form
    407.69/611.80 = 151.19/x
  3. Step 3: Cross multiply
    407.69x = 611.80 × 151.19
  4. Step 4: Simplify right side
    407.69x = 92,498.04
  5. Step 5: Solve for x
    x = 92,498.04/407.69
  6. Step 6: Final answer
    x = 226.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.