Home / 678,223.80-1,017,335.70-412,505.40

Finding the Fourth Proportional to 678,223.80, 1,017,335.70 and 412,505.40

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Solution

The fourth proportional to 678,223.80, 1,017,335.70 and 412,505.40 is: 618,758.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,223.80 : 1,017,335.70 = 412,505.40 : x
  2. Step 2: Convert to fraction form
    678,223.80/1,017,335.70 = 412,505.40/x
  3. Step 3: Cross multiply
    678,223.80x = 1,017,335.70 × 412,505.40
  4. Step 4: Simplify right side
    678,223.80x = 419,656,469,862.78
  5. Step 5: Solve for x
    x = 419,656,469,862.78/678,223.80
  6. Step 6: Final answer
    x = 618,758.10

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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.