Home / 1,291,205.80-1,936,808.70-392,640.40

Finding the Fourth Proportional to 1,291,205.80, 1,936,808.70 and 392,640.40

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Solution

The fourth proportional to 1,291,205.80, 1,936,808.70 and 392,640.40 is: 588,960.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,205.80 : 1,936,808.70 = 392,640.40 : x
  2. Step 2: Convert to fraction form
    1,291,205.80/1,936,808.70 = 392,640.40/x
  3. Step 3: Cross multiply
    1,291,205.80x = 1,936,808.70 × 392,640.40
  4. Step 4: Simplify right side
    1,291,205.80x = 760,469,342,691.48
  5. Step 5: Solve for x
    x = 760,469,342,691.48/1,291,205.80
  6. Step 6: Final answer
    x = 588,960.60

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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.