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Finding the Fourth Proportional to 518,540.40, 777,632.40 and 252,129.24

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Solution

The fourth proportional to 518,540.40, 777,632.40 and 252,129.24 is: 378,107.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,540.40 : 777,632.40 = 252,129.24 : x
  2. Step 2: Convert to fraction form
    518,540.40/777,632.40 = 252,129.24/x
  3. Step 3: Cross multiply
    518,540.40x = 777,632.40 × 252,129.24
  4. Step 4: Simplify right side
    518,540.40x = 196,063,866,011.38
  5. Step 5: Solve for x
    x = 196,063,866,011.38/518,540.40
  6. Step 6: Final answer
    x = 378,107.21

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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.