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Finding the Fourth Proportional to 345,978.80, 517,816.20 and 250,938.80

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Solution

The fourth proportional to 345,978.80, 517,816.20 and 250,938.80 is: 375,572.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,978.80 : 517,816.20 = 250,938.80 : x
  2. Step 2: Convert to fraction form
    345,978.80/517,816.20 = 250,938.80/x
  3. Step 3: Cross multiply
    345,978.80x = 517,816.20 × 250,938.80
  4. Step 4: Simplify right side
    345,978.80x = 129,940,175,848.56
  5. Step 5: Solve for x
    x = 129,940,175,848.56/345,978.80
  6. Step 6: Final answer
    x = 375,572.65

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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.