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Finding the Fourth Proportional to 426,752.29, 640,161.10 and 127,209.97

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Solution

The fourth proportional to 426,752.29, 640,161.10 and 127,209.97 is: 190,824.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,752.29 : 640,161.10 = 127,209.97 : x
  2. Step 2: Convert to fraction form
    426,752.29/640,161.10 = 127,209.97/x
  3. Step 3: Cross multiply
    426,752.29x = 640,161.10 × 127,209.97
  4. Step 4: Simplify right side
    426,752.29x = 81,434,871,125.36
  5. Step 5: Solve for x
    x = 81,434,871,125.36/426,752.29
  6. Step 6: Final answer
    x = 190,824.69

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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.