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Finding the Fourth Proportional to 407.73, 611.47 and 133.76

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Solution

The fourth proportional to 407.73, 611.47 and 133.76 is: 200.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.73 : 611.47 = 133.76 : x
  2. Step 2: Convert to fraction form
    407.73/611.47 = 133.76/x
  3. Step 3: Cross multiply
    407.73x = 611.47 × 133.76
  4. Step 4: Simplify right side
    407.73x = 81,790.23
  5. Step 5: Solve for x
    x = 81,790.23/407.73
  6. Step 6: Final answer
    x = 200.60

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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.