Home / 649,190.77-895,917.38-391,148.78

Finding the Fourth Proportional to 649,190.77, 895,917.38 and 391,148.78

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Solution

The fourth proportional to 649,190.77, 895,917.38 and 391,148.78 is: 539,805.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,190.77 : 895,917.38 = 391,148.78 : x
  2. Step 2: Convert to fraction form
    649,190.77/895,917.38 = 391,148.78/x
  3. Step 3: Cross multiply
    649,190.77x = 895,917.38 × 391,148.78
  4. Step 4: Simplify right side
    649,190.77x = 350,436,983,732.47
  5. Step 5: Solve for x
    x = 350,436,983,732.47/649,190.77
  6. Step 6: Final answer
    x = 539,805.86

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1.5x scale

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.