Home / 1,291,212.80-1,936,819.20-392,647.40

Finding the Fourth Proportional to 1,291,212.80, 1,936,819.20 and 392,647.40

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Solution

The fourth proportional to 1,291,212.80, 1,936,819.20 and 392,647.40 is: 588,971.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,212.80 : 1,936,819.20 = 392,647.40 : x
  2. Step 2: Convert to fraction form
    1,291,212.80/1,936,819.20 = 392,647.40/x
  3. Step 3: Cross multiply
    1,291,212.80x = 1,936,819.20 × 392,647.40
  4. Step 4: Simplify right side
    1,291,212.80x = 760,487,023,150.08
  5. Step 5: Solve for x
    x = 760,487,023,150.08/1,291,212.80
  6. Step 6: Final answer
    x = 588,971.10

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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.