Home / 1,279,745.40-1,920,006.90-718,404.60

Finding the Fourth Proportional to 1,279,745.40, 1,920,006.90 and 718,404.60

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Solution

The fourth proportional to 1,279,745.40, 1,920,006.90 and 718,404.60 is: 1,077,825.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,745.40 : 1,920,006.90 = 718,404.60 : x
  2. Step 2: Convert to fraction form
    1,279,745.40/1,920,006.90 = 718,404.60/x
  3. Step 3: Cross multiply
    1,279,745.40x = 1,920,006.90 × 718,404.60
  4. Step 4: Simplify right side
    1,279,745.40x = 1,379,341,788,991.74
  5. Step 5: Solve for x
    x = 1,379,341,788,991.74/1,279,745.40
  6. Step 6: Final answer
    x = 1,077,825.16

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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.