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Finding the Fourth Proportional to 1,218.44, 1,827.78 and 396.44

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Solution

The fourth proportional to 1,218.44, 1,827.78 and 396.44 is: 594.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.44 : 1,827.78 = 396.44 : x
  2. Step 2: Convert to fraction form
    1,218.44/1,827.78 = 396.44/x
  3. Step 3: Cross multiply
    1,218.44x = 1,827.78 × 396.44
  4. Step 4: Simplify right side
    1,218.44x = 724,605.10
  5. Step 5: Solve for x
    x = 724,605.10/1,218.44
  6. Step 6: Final answer
    x = 594.70

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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.