Home / 1,226.49-1,839.05-640.05

Finding the Fourth Proportional to 1,226.49, 1,839.05 and 640.05

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Solution

The fourth proportional to 1,226.49, 1,839.05 and 640.05 is: 959.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,226.49 : 1,839.05 = 640.05 : x
  2. Step 2: Convert to fraction form
    1,226.49/1,839.05 = 640.05/x
  3. Step 3: Cross multiply
    1,226.49x = 1,839.05 × 640.05
  4. Step 4: Simplify right side
    1,226.49x = 1,177,090.20
  5. Step 5: Solve for x
    x = 1,177,090.20/1,226.49
  6. Step 6: Final answer
    x = 959.72

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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.