Home / 813,359.80-1,220,202.42-280,900.12

Finding the Fourth Proportional to 813,359.80, 1,220,202.42 and 280,900.12

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Solution

The fourth proportional to 813,359.80, 1,220,202.42 and 280,900.12 is: 421,406.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,359.80 : 1,220,202.42 = 280,900.12 : x
  2. Step 2: Convert to fraction form
    813,359.80/1,220,202.42 = 280,900.12/x
  3. Step 3: Cross multiply
    813,359.80x = 1,220,202.42 × 280,900.12
  4. Step 4: Simplify right side
    813,359.80x = 342,755,006,202.29
  5. Step 5: Solve for x
    x = 342,755,006,202.29/813,359.80
  6. Step 6: Final answer
    x = 421,406.38

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1.5x scale

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.