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Finding the Fourth Proportional to 1,304.44, 1,964.47 and 1,187.80

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Solution

The fourth proportional to 1,304.44, 1,964.47 and 1,187.80 is: 1,788.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,304.44 : 1,964.47 = 1,187.80 : x
  2. Step 2: Convert to fraction form
    1,304.44/1,964.47 = 1,187.80/x
  3. Step 3: Cross multiply
    1,304.44x = 1,964.47 × 1,187.80
  4. Step 4: Simplify right side
    1,304.44x = 2,333,391.81
  5. Step 5: Solve for x
    x = 2,333,391.81/1,304.44
  6. Step 6: Final answer
    x = 1,788.81

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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.