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Finding the Fourth Proportional to 1,363.06, 2,043.96 and 388.93

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Solution

The fourth proportional to 1,363.06, 2,043.96 and 388.93 is: 583.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,363.06 : 2,043.96 = 388.93 : x
  2. Step 2: Convert to fraction form
    1,363.06/2,043.96 = 388.93/x
  3. Step 3: Cross multiply
    1,363.06x = 2,043.96 × 388.93
  4. Step 4: Simplify right side
    1,363.06x = 794,947.14
  5. Step 5: Solve for x
    x = 794,947.14/1,363.06
  6. Step 6: Final answer
    x = 583.21

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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.