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Finding the Fourth Proportional to 1,146.41, 1,719.63 and 280.73

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Solution

The fourth proportional to 1,146.41, 1,719.63 and 280.73 is: 421.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,146.41 : 1,719.63 = 280.73 : x
  2. Step 2: Convert to fraction form
    1,146.41/1,719.63 = 280.73/x
  3. Step 3: Cross multiply
    1,146.41x = 1,719.63 × 280.73
  4. Step 4: Simplify right side
    1,146.41x = 482,751.73
  5. Step 5: Solve for x
    x = 482,751.73/1,146.41
  6. Step 6: Final answer
    x = 421.10

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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.