Home / 1,279,780.84-1,919,904.54-640,418.92

Finding the Fourth Proportional to 1,279,780.84, 1,919,904.54 and 640,418.92

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Solution

The fourth proportional to 1,279,780.84, 1,919,904.54 and 640,418.92 is: 960,745.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,780.84 : 1,919,904.54 = 640,418.92 : x
  2. Step 2: Convert to fraction form
    1,279,780.84/1,919,904.54 = 640,418.92/x
  3. Step 3: Cross multiply
    1,279,780.84x = 1,919,904.54 × 640,418.92
  4. Step 4: Simplify right side
    1,279,780.84x = 1,229,543,192,009.90
  5. Step 5: Solve for x
    x = 1,229,543,192,009.90/1,279,780.84
  6. Step 6: Final answer
    x = 960,745.12

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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.