Home / 431,357.18-647,035.78-131,838.62

Finding the Fourth Proportional to 431,357.18, 647,035.78 and 131,838.62

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Solution

The fourth proportional to 431,357.18, 647,035.78 and 131,838.62 is: 197,757.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,357.18 : 647,035.78 = 131,838.62 : x
  2. Step 2: Convert to fraction form
    431,357.18/647,035.78 = 131,838.62/x
  3. Step 3: Cross multiply
    431,357.18x = 647,035.78 × 131,838.62
  4. Step 4: Simplify right side
    431,357.18x = 85,304,304,325.82
  5. Step 5: Solve for x
    x = 85,304,304,325.82/431,357.18
  6. Step 6: Final answer
    x = 197,757.93

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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.