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Finding the Fourth Proportional to 1,209.84, 1,805.88 and 1,107.24

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Solution

The fourth proportional to 1,209.84, 1,805.88 and 1,107.24 is: 1,652.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.84 : 1,805.88 = 1,107.24 : x
  2. Step 2: Convert to fraction form
    1,209.84/1,805.88 = 1,107.24/x
  3. Step 3: Cross multiply
    1,209.84x = 1,805.88 × 1,107.24
  4. Step 4: Simplify right side
    1,209.84x = 1,999,542.57
  5. Step 5: Solve for x
    x = 1,999,542.57/1,209.84
  6. Step 6: Final answer
    x = 1,652.73

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.