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Finding the Fourth Proportional to 1,156.54, 1,734.79 and 279.03

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Solution

The fourth proportional to 1,156.54, 1,734.79 and 279.03 is: 418.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156.54 : 1,734.79 = 279.03 : x
  2. Step 2: Convert to fraction form
    1,156.54/1,734.79 = 279.03/x
  3. Step 3: Cross multiply
    1,156.54x = 1,734.79 × 279.03
  4. Step 4: Simplify right side
    1,156.54x = 484,060.52
  5. Step 5: Solve for x
    x = 484,060.52/1,156.54
  6. Step 6: Final answer
    x = 418.54

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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.