Home / 1,291,213.80-1,936,820.70-392,648.40

Finding the Fourth Proportional to 1,291,213.80, 1,936,820.70 and 392,648.40

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Solution

The fourth proportional to 1,291,213.80, 1,936,820.70 and 392,648.40 is: 588,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,213.80 : 1,936,820.70 = 392,648.40 : x
  2. Step 2: Convert to fraction form
    1,291,213.80/1,936,820.70 = 392,648.40/x
  3. Step 3: Cross multiply
    1,291,213.80x = 1,936,820.70 × 392,648.40
  4. Step 4: Simplify right side
    1,291,213.80x = 760,489,548,941.88
  5. Step 5: Solve for x
    x = 760,489,548,941.88/1,291,213.80
  6. Step 6: Final answer
    x = 588,972.60

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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.