Home / 1,372.19-2,058.11-809.65

Finding the Fourth Proportional to 1,372.19, 2,058.11 and 809.65

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Solution

The fourth proportional to 1,372.19, 2,058.11 and 809.65 is: 1,214.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372.19 : 2,058.11 = 809.65 : x
  2. Step 2: Convert to fraction form
    1,372.19/2,058.11 = 809.65/x
  3. Step 3: Cross multiply
    1,372.19x = 2,058.11 × 809.65
  4. Step 4: Simplify right side
    1,372.19x = 1,666,338.47
  5. Step 5: Solve for x
    x = 1,666,338.47/1,372.19
  6. Step 6: Final answer
    x = 1,214.36

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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.