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Finding the Fourth Proportional to 1,362.98, 2,044.22 and 389.15

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Solution

The fourth proportional to 1,362.98, 2,044.22 and 389.15 is: 583.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,362.98 : 2,044.22 = 389.15 : x
  2. Step 2: Convert to fraction form
    1,362.98/2,044.22 = 389.15/x
  3. Step 3: Cross multiply
    1,362.98x = 2,044.22 × 389.15
  4. Step 4: Simplify right side
    1,362.98x = 795,514.30
  5. Step 5: Solve for x
    x = 795,514.30/1,362.98
  6. Step 6: Final answer
    x = 583.66

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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.