Home / 1,801.20-2,699.49-1,389.47

Finding the Fourth Proportional to 1,801.20, 2,699.49 and 1,389.47

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Solution

The fourth proportional to 1,801.20, 2,699.49 and 1,389.47 is: 2,082.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,801.20 : 2,699.49 = 1,389.47 : x
  2. Step 2: Convert to fraction form
    1,801.20/2,699.49 = 1,389.47/x
  3. Step 3: Cross multiply
    1,801.20x = 2,699.49 × 1,389.47
  4. Step 4: Simplify right side
    1,801.20x = 3,750,853.42
  5. Step 5: Solve for x
    x = 3,750,853.42/1,801.20
  6. Step 6: Final answer
    x = 2,082.42

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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.