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Finding the Fourth Proportional to 359,404.80, 538,761.60 and 279,398.40

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Solution

The fourth proportional to 359,404.80, 538,761.60 and 279,398.40 is: 418,828.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,404.80 : 538,761.60 = 279,398.40 : x
  2. Step 2: Convert to fraction form
    359,404.80/538,761.60 = 279,398.40/x
  3. Step 3: Cross multiply
    359,404.80x = 538,761.60 × 279,398.40
  4. Step 4: Simplify right side
    359,404.80x = 150,529,129,021.44
  5. Step 5: Solve for x
    x = 150,529,129,021.44/359,404.80
  6. Step 6: Final answer
    x = 418,828.93

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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.