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Finding the Fourth Proportional to 1,229.54, 1,844.12 and 407.82

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Solution

The fourth proportional to 1,229.54, 1,844.12 and 407.82 is: 611.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,229.54 : 1,844.12 = 407.82 : x
  2. Step 2: Convert to fraction form
    1,229.54/1,844.12 = 407.82/x
  3. Step 3: Cross multiply
    1,229.54x = 1,844.12 × 407.82
  4. Step 4: Simplify right side
    1,229.54x = 752,066.98
  5. Step 5: Solve for x
    x = 752,066.98/1,229.54
  6. Step 6: Final answer
    x = 611.67

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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.