Home / 1,379.02-1,897.42-1,191.91

Finding the Fourth Proportional to 1,379.02, 1,897.42 and 1,191.91

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Solution

The fourth proportional to 1,379.02, 1,897.42 and 1,191.91 is: 1,639.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379.02 : 1,897.42 = 1,191.91 : x
  2. Step 2: Convert to fraction form
    1,379.02/1,897.42 = 1,191.91/x
  3. Step 3: Cross multiply
    1,379.02x = 1,897.42 × 1,191.91
  4. Step 4: Simplify right side
    1,379.02x = 2,261,553.87
  5. Step 5: Solve for x
    x = 2,261,553.87/1,379.02
  6. Step 6: Final answer
    x = 1,639.97

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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.