Home / 426,689.01-639,819.23-142,278.89

Finding the Fourth Proportional to 426,689.01, 639,819.23 and 142,278.89

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Solution

The fourth proportional to 426,689.01, 639,819.23 and 142,278.89 is: 213,346.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,689.01 : 639,819.23 = 142,278.89 : x
  2. Step 2: Convert to fraction form
    426,689.01/639,819.23 = 142,278.89/x
  3. Step 3: Cross multiply
    426,689.01x = 639,819.23 × 142,278.89
  4. Step 4: Simplify right side
    426,689.01x = 91,032,765,934.56
  5. Step 5: Solve for x
    x = 91,032,765,934.56/426,689.01
  6. Step 6: Final answer
    x = 213,346.87

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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.