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Finding the Fourth Proportional to 1,121.73, 1,680.98 and 601.31

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Solution

The fourth proportional to 1,121.73, 1,680.98 and 601.31 is: 901.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.73 : 1,680.98 = 601.31 : x
  2. Step 2: Convert to fraction form
    1,121.73/1,680.98 = 601.31/x
  3. Step 3: Cross multiply
    1,121.73x = 1,680.98 × 601.31
  4. Step 4: Simplify right side
    1,121.73x = 1,010,778.67
  5. Step 5: Solve for x
    x = 1,010,778.67/1,121.73
  6. Step 6: Final answer
    x = 901.09

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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.