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Finding the Fourth Proportional to 1,362.72, 2,044.08 and 388.92

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Solution

The fourth proportional to 1,362.72, 2,044.08 and 388.92 is: 583.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.72 : 2,044.08 = 388.92 : x
  2. Step 2: Convert to fraction form
    1,362.72/2,044.08 = 388.92/x
  3. Step 3: Cross multiply
    1,362.72x = 2,044.08 × 388.92
  4. Step 4: Simplify right side
    1,362.72x = 794,983.59
  5. Step 5: Solve for x
    x = 794,983.59/1,362.72
  6. Step 6: Final answer
    x = 583.38

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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.