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Finding the Fourth Proportional to 426,885.92, 640,340.40 and 111,335.84

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Solution

The fourth proportional to 426,885.92, 640,340.40 and 111,335.84 is: 167,006.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,885.92 : 640,340.40 = 111,335.84 : x
  2. Step 2: Convert to fraction form
    426,885.92/640,340.40 = 111,335.84/x
  3. Step 3: Cross multiply
    426,885.92x = 640,340.40 × 111,335.84
  4. Step 4: Simplify right side
    426,885.92x = 71,292,836,319.94
  5. Step 5: Solve for x
    x = 71,292,836,319.94/426,885.92
  6. Step 6: Final answer
    x = 167,006.76

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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.