Home / 812,129.13-1,120,724.55-449,545.23

Finding the Fourth Proportional to 812,129.13, 1,120,724.55 and 449,545.23

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Solution

The fourth proportional to 812,129.13, 1,120,724.55 and 449,545.23 is: 620,364.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,129.13 : 1,120,724.55 = 449,545.23 : x
  2. Step 2: Convert to fraction form
    812,129.13/1,120,724.55 = 449,545.23/x
  3. Step 3: Cross multiply
    812,129.13x = 1,120,724.55 × 449,545.23
  4. Step 4: Simplify right side
    812,129.13x = 503,816,375,596.40
  5. Step 5: Solve for x
    x = 503,816,375,596.40/812,129.13
  6. Step 6: Final answer
    x = 620,364.86

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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.