Home / 1,221,109.15-1,685,234.11-677,420.09

Finding the Fourth Proportional to 1,221,109.15, 1,685,234.11 and 677,420.09

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Solution

The fourth proportional to 1,221,109.15, 1,685,234.11 and 677,420.09 is: 934,897.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,109.15 : 1,685,234.11 = 677,420.09 : x
  2. Step 2: Convert to fraction form
    1,221,109.15/1,685,234.11 = 677,420.09/x
  3. Step 3: Cross multiply
    1,221,109.15x = 1,685,234.11 × 677,420.09
  4. Step 4: Simplify right side
    1,221,109.15x = 1,141,611,435,197.62
  5. Step 5: Solve for x
    x = 1,141,611,435,197.62/1,221,109.15
  6. Step 6: Final answer
    x = 934,897.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.