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Finding the Fourth Proportional to 1,908, 2,631.36 and 1,244.22

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Solution

The fourth proportional to 1,908, 2,631.36 and 1,244.22 is: 1,715.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908 : 2,631.36 = 1,244.22 : x
  2. Step 2: Convert to fraction form
    1,908/2,631.36 = 1,244.22/x
  3. Step 3: Cross multiply
    1,908x = 2,631.36 × 1,244.22
  4. Step 4: Simplify right side
    1,908x = 3,273,990.74
  5. Step 5: Solve for x
    x = 3,273,990.74/1,908
  6. Step 6: Final answer
    x = 1,715.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.