Home / 426,389.27-639,575.12-142,100.46

Finding the Fourth Proportional to 426,389.27, 639,575.12 and 142,100.46

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Solution

The fourth proportional to 426,389.27, 639,575.12 and 142,100.46 is: 213,147.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,389.27 : 639,575.12 = 142,100.46 : x
  2. Step 2: Convert to fraction form
    426,389.27/639,575.12 = 142,100.46/x
  3. Step 3: Cross multiply
    426,389.27x = 639,575.12 × 142,100.46
  4. Step 4: Simplify right side
    426,389.27x = 90,883,918,046.05
  5. Step 5: Solve for x
    x = 90,883,918,046.05/426,389.27
  6. Step 6: Final answer
    x = 213,147.76

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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.