Home / 427,974.66-641,960.46-128,453.94

Finding the Fourth Proportional to 427,974.66, 641,960.46 and 128,453.94

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Solution

The fourth proportional to 427,974.66, 641,960.46 and 128,453.94 is: 192,680.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,974.66 : 641,960.46 = 128,453.94 : x
  2. Step 2: Convert to fraction form
    427,974.66/641,960.46 = 128,453.94/x
  3. Step 3: Cross multiply
    427,974.66x = 641,960.46 × 128,453.94
  4. Step 4: Simplify right side
    427,974.66x = 82,462,350,411.21
  5. Step 5: Solve for x
    x = 82,462,350,411.21/427,974.66
  6. Step 6: Final answer
    x = 192,680.45

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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.