Home / 839,243.20-1,259,389.68-340,607.20

Finding the Fourth Proportional to 839,243.20, 1,259,389.68 and 340,607.20

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Solution

The fourth proportional to 839,243.20, 1,259,389.68 and 340,607.20 is: 511,123.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,243.20 : 1,259,389.68 = 340,607.20 : x
  2. Step 2: Convert to fraction form
    839,243.20/1,259,389.68 = 340,607.20/x
  3. Step 3: Cross multiply
    839,243.20x = 1,259,389.68 × 340,607.20
  4. Step 4: Simplify right side
    839,243.20x = 428,957,192,613.70
  5. Step 5: Solve for x
    x = 428,957,192,613.70/839,243.20
  6. Step 6: Final answer
    x = 511,123.82

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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.