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Finding the Fourth Proportional to 521,499.84, 782,272 and 221,939.52

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Solution

The fourth proportional to 521,499.84, 782,272 and 221,939.52 is: 332,918.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,499.84 : 782,272 = 221,939.52 : x
  2. Step 2: Convert to fraction form
    521,499.84/782,272 = 221,939.52/x
  3. Step 3: Cross multiply
    521,499.84x = 782,272 × 221,939.52
  4. Step 4: Simplify right side
    521,499.84x = 173,617,072,189.44
  5. Step 5: Solve for x
    x = 173,617,072,189.44/521,499.84
  6. Step 6: Final answer
    x = 332,918.74

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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.