Home / 812,139.40-1,218,209.10-251,173.90

Finding the Fourth Proportional to 812,139.40, 1,218,209.10 and 251,173.90

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Solution

The fourth proportional to 812,139.40, 1,218,209.10 and 251,173.90 is: 376,760.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,139.40 : 1,218,209.10 = 251,173.90 : x
  2. Step 2: Convert to fraction form
    812,139.40/1,218,209.10 = 251,173.90/x
  3. Step 3: Cross multiply
    812,139.40x = 1,218,209.10 × 251,173.90
  4. Step 4: Simplify right side
    812,139.40x = 305,982,330,662.49
  5. Step 5: Solve for x
    x = 305,982,330,662.49/812,139.40
  6. Step 6: Final answer
    x = 376,760.85

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Double scale
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Similar ratio
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1.5x scale

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.