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Finding the Fourth Proportional to 426,189.20, 638,992.20 and 201,657.20

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Solution

The fourth proportional to 426,189.20, 638,992.20 and 201,657.20 is: 302,347.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,189.20 : 638,992.20 = 201,657.20 : x
  2. Step 2: Convert to fraction form
    426,189.20/638,992.20 = 201,657.20/x
  3. Step 3: Cross multiply
    426,189.20x = 638,992.20 × 201,657.20
  4. Step 4: Simplify right side
    426,189.20x = 128,857,377,873.84
  5. Step 5: Solve for x
    x = 128,857,377,873.84/426,189.20
  6. Step 6: Final answer
    x = 302,347.83

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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.