Home / 812,685.51-1,219,108.46-280,136.43

Finding the Fourth Proportional to 812,685.51, 1,219,108.46 and 280,136.43

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Solution

The fourth proportional to 812,685.51, 1,219,108.46 and 280,136.43 is: 420,232.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,685.51 : 1,219,108.46 = 280,136.43 : x
  2. Step 2: Convert to fraction form
    812,685.51/1,219,108.46 = 280,136.43/x
  3. Step 3: Cross multiply
    812,685.51x = 1,219,108.46 × 280,136.43
  4. Step 4: Simplify right side
    812,685.51x = 341,516,690,366.52
  5. Step 5: Solve for x
    x = 341,516,690,366.52/812,685.51
  6. Step 6: Final answer
    x = 420,232.29

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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.