Home / 431,388.81-647,084.84-131,868.23

Finding the Fourth Proportional to 431,388.81, 647,084.84 and 131,868.23

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Solution

The fourth proportional to 431,388.81, 647,084.84 and 131,868.23 is: 197,802.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,388.81 : 647,084.84 = 131,868.23 : x
  2. Step 2: Convert to fraction form
    431,388.81/647,084.84 = 131,868.23/x
  3. Step 3: Cross multiply
    431,388.81x = 647,084.84 × 131,868.23
  4. Step 4: Simplify right side
    431,388.81x = 85,329,928,615.87
  5. Step 5: Solve for x
    x = 85,329,928,615.87/431,388.81
  6. Step 6: Final answer
    x = 197,802.83

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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.