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Finding the Fourth Proportional to 426,103.20, 638,863.20 and 201,571.20

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Solution

The fourth proportional to 426,103.20, 638,863.20 and 201,571.20 is: 302,218.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,103.20 : 638,863.20 = 201,571.20 : x
  2. Step 2: Convert to fraction form
    426,103.20/638,863.20 = 201,571.20/x
  3. Step 3: Cross multiply
    426,103.20x = 638,863.20 × 201,571.20
  4. Step 4: Simplify right side
    426,103.20x = 128,776,421,859.84
  5. Step 5: Solve for x
    x = 128,776,421,859.84/426,103.20
  6. Step 6: Final answer
    x = 302,218.86

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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.