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Finding the Fourth Proportional to 1,244.46, 1,873.94 and 900.21

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Solution

The fourth proportional to 1,244.46, 1,873.94 and 900.21 is: 1,355.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,244.46 : 1,873.94 = 900.21 : x
  2. Step 2: Convert to fraction form
    1,244.46/1,873.94 = 900.21/x
  3. Step 3: Cross multiply
    1,244.46x = 1,873.94 × 900.21
  4. Step 4: Simplify right side
    1,244.46x = 1,686,942.05
  5. Step 5: Solve for x
    x = 1,686,942.05/1,244.46
  6. Step 6: Final answer
    x = 1,355.56

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.