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Finding the Fourth Proportional to 347,212.80, 520,819.20 and 207,244.80

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Solution

The fourth proportional to 347,212.80, 520,819.20 and 207,244.80 is: 310,867.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,212.80 : 520,819.20 = 207,244.80 : x
  2. Step 2: Convert to fraction form
    347,212.80/520,819.20 = 207,244.80/x
  3. Step 3: Cross multiply
    347,212.80x = 520,819.20 × 207,244.80
  4. Step 4: Simplify right side
    347,212.80x = 107,937,070,940.16
  5. Step 5: Solve for x
    x = 107,937,070,940.16/347,212.80
  6. Step 6: Final answer
    x = 310,867.20

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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.