Home / 1,292.36-1,938.82-426.64

Finding the Fourth Proportional to 1,292.36, 1,938.82 and 426.64

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Solution

The fourth proportional to 1,292.36, 1,938.82 and 426.64 is: 640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292.36 : 1,938.82 = 426.64 : x
  2. Step 2: Convert to fraction form
    1,292.36/1,938.82 = 426.64/x
  3. Step 3: Cross multiply
    1,292.36x = 1,938.82 × 426.64
  4. Step 4: Simplify right side
    1,292.36x = 827,178.16
  5. Step 5: Solve for x
    x = 827,178.16/1,292.36
  6. Step 6: Final answer
    x = 640.05

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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.