Home / 1,337.40-1,844.10-1,189.80

Finding the Fourth Proportional to 1,337.40, 1,844.10 and 1,189.80

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Solution

The fourth proportional to 1,337.40, 1,844.10 and 1,189.80 is: 1,640.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,337.40 : 1,844.10 = 1,189.80 : x
  2. Step 2: Convert to fraction form
    1,337.40/1,844.10 = 1,189.80/x
  3. Step 3: Cross multiply
    1,337.40x = 1,844.10 × 1,189.80
  4. Step 4: Simplify right side
    1,337.40x = 2,194,110.18
  5. Step 5: Solve for x
    x = 2,194,110.18/1,337.40
  6. Step 6: Final answer
    x = 1,640.58

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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.