Home / 813,454.80-1,220,128.64-280,983.44

Finding the Fourth Proportional to 813,454.80, 1,220,128.64 and 280,983.44

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Solution

The fourth proportional to 813,454.80, 1,220,128.64 and 280,983.44 is: 421,456.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,454.80 : 1,220,128.64 = 280,983.44 : x
  2. Step 2: Convert to fraction form
    813,454.80/1,220,128.64 = 280,983.44/x
  3. Step 3: Cross multiply
    813,454.80x = 1,220,128.64 × 280,983.44
  4. Step 4: Simplify right side
    813,454.80x = 342,835,942,509.72
  5. Step 5: Solve for x
    x = 342,835,942,509.72/813,454.80
  6. Step 6: Final answer
    x = 421,456.66

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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.