Home / 813,458.80-1,220,879.40-655,865.20

Finding the Fourth Proportional to 813,458.80, 1,220,879.40 and 655,865.20

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Solution

The fourth proportional to 813,458.80, 1,220,879.40 and 655,865.20 is: 984,355.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,458.80 : 1,220,879.40 = 655,865.20 : x
  2. Step 2: Convert to fraction form
    813,458.80/1,220,879.40 = 655,865.20/x
  3. Step 3: Cross multiply
    813,458.80x = 1,220,879.40 × 655,865.20
  4. Step 4: Simplify right side
    813,458.80x = 800,732,311,856.88
  5. Step 5: Solve for x
    x = 800,732,311,856.88/813,458.80
  6. Step 6: Final answer
    x = 984,355.09

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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.