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Finding the Fourth Proportional to 347,900.80, 521,851.20 and 207,932.80

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Solution

The fourth proportional to 347,900.80, 521,851.20 and 207,932.80 is: 311,899.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,900.80 : 521,851.20 = 207,932.80 : x
  2. Step 2: Convert to fraction form
    347,900.80/521,851.20 = 207,932.80/x
  3. Step 3: Cross multiply
    347,900.80x = 521,851.20 × 207,932.80
  4. Step 4: Simplify right side
    347,900.80x = 108,509,981,199.36
  5. Step 5: Solve for x
    x = 108,509,981,199.36/347,900.80
  6. Step 6: Final answer
    x = 311,899.20

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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.