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Finding the Fourth Proportional to 1,377.99, 1,900.80 and 1,098

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Solution

The fourth proportional to 1,377.99, 1,900.80 and 1,098 is: 1,514.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.99 : 1,900.80 = 1,098 : x
  2. Step 2: Convert to fraction form
    1,377.99/1,900.80 = 1,098/x
  3. Step 3: Cross multiply
    1,377.99x = 1,900.80 × 1,098
  4. Step 4: Simplify right side
    1,377.99x = 2,087,078.40
  5. Step 5: Solve for x
    x = 2,087,078.40/1,377.99
  6. Step 6: Final answer
    x = 1,514.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.