Home / 426,583.38-639,809.31-142,278.90

Finding the Fourth Proportional to 426,583.38, 639,809.31 and 142,278.90

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Solution

The fourth proportional to 426,583.38, 639,809.31 and 142,278.90 is: 213,396.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,583.38 : 639,809.31 = 142,278.90 : x
  2. Step 2: Convert to fraction form
    426,583.38/639,809.31 = 142,278.90/x
  3. Step 3: Cross multiply
    426,583.38x = 639,809.31 × 142,278.90
  4. Step 4: Simplify right side
    426,583.38x = 91,031,364,836.56
  5. Step 5: Solve for x
    x = 91,031,364,836.56/426,583.38
  6. Step 6: Final answer
    x = 213,396.42

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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.