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Finding the Fourth Proportional to 1,191.54, 1,787.48 and 369.89

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Solution

The fourth proportional to 1,191.54, 1,787.48 and 369.89 is: 554.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.54 : 1,787.48 = 369.89 : x
  2. Step 2: Convert to fraction form
    1,191.54/1,787.48 = 369.89/x
  3. Step 3: Cross multiply
    1,191.54x = 1,787.48 × 369.89
  4. Step 4: Simplify right side
    1,191.54x = 661,160.19
  5. Step 5: Solve for x
    x = 661,160.19/1,191.54
  6. Step 6: Final answer
    x = 554.88

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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.