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Finding the Fourth Proportional to 359,251.20, 538,212.60 and 209,563.20

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Solution

The fourth proportional to 359,251.20, 538,212.60 and 209,563.20 is: 313,957.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    359,251.20 : 538,212.60 = 209,563.20 : x
  2. Step 2: Convert to fraction form
    359,251.20/538,212.60 = 209,563.20/x
  3. Step 3: Cross multiply
    359,251.20x = 538,212.60 × 209,563.20
  4. Step 4: Simplify right side
    359,251.20x = 112,789,554,736.32
  5. Step 5: Solve for x
    x = 112,789,554,736.32/359,251.20
  6. Step 6: Final answer
    x = 313,957.35

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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.