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Finding the Fourth Proportional to 426,943.68, 640,452 and 127,404.96

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Solution

The fourth proportional to 426,943.68, 640,452 and 127,404.96 is: 191,118.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,943.68 : 640,452 = 127,404.96 : x
  2. Step 2: Convert to fraction form
    426,943.68/640,452 = 127,404.96/x
  3. Step 3: Cross multiply
    426,943.68x = 640,452 × 127,404.96
  4. Step 4: Simplify right side
    426,943.68x = 81,596,761,441.92
  5. Step 5: Solve for x
    x = 81,596,761,441.92/426,943.68
  6. Step 6: Final answer
    x = 191,118.33

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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.