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Finding the Fourth Proportional to 347,808.80, 521,713.20 and 137,338.40

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Solution

The fourth proportional to 347,808.80, 521,713.20 and 137,338.40 is: 206,007.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,808.80 : 521,713.20 = 137,338.40 : x
  2. Step 2: Convert to fraction form
    347,808.80/521,713.20 = 137,338.40/x
  3. Step 3: Cross multiply
    347,808.80x = 521,713.20 × 137,338.40
  4. Step 4: Simplify right side
    347,808.80x = 71,651,256,146.88
  5. Step 5: Solve for x
    x = 71,651,256,146.88/347,808.80
  6. Step 6: Final answer
    x = 206,007.60

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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.