Home / 426,316.45-639,336.21-141,930.58

Finding the Fourth Proportional to 426,316.45, 639,336.21 and 141,930.58

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Solution

The fourth proportional to 426,316.45, 639,336.21 and 141,930.58 is: 212,849.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,316.45 : 639,336.21 = 141,930.58 : x
  2. Step 2: Convert to fraction form
    426,316.45/639,336.21 = 141,930.58/x
  3. Step 3: Cross multiply
    426,316.45x = 639,336.21 × 141,930.58
  4. Step 4: Simplify right side
    426,316.45x = 90,741,359,100.30
  5. Step 5: Solve for x
    x = 90,741,359,100.30/426,316.45
  6. Step 6: Final answer
    x = 212,849.77

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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.