Home / 426,945.20-640,528.70-127,425.76

Finding the Fourth Proportional to 426,945.20, 640,528.70 and 127,425.76

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Solution

The fourth proportional to 426,945.20, 640,528.70 and 127,425.76 is: 191,171.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,945.20 : 640,528.70 = 127,425.76 : x
  2. Step 2: Convert to fraction form
    426,945.20/640,528.70 = 127,425.76/x
  3. Step 3: Cross multiply
    426,945.20x = 640,528.70 × 127,425.76
  4. Step 4: Simplify right side
    426,945.20x = 81,619,854,160.86
  5. Step 5: Solve for x
    x = 81,619,854,160.86/426,945.20
  6. Step 6: Final answer
    x = 191,171.74

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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.