Home / 812,479.01-1,121,220.34-449,902.87

Finding the Fourth Proportional to 812,479.01, 1,121,220.34 and 449,902.87

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Solution

The fourth proportional to 812,479.01, 1,121,220.34 and 449,902.87 is: 620,865.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,479.01 : 1,121,220.34 = 449,902.87 : x
  2. Step 2: Convert to fraction form
    812,479.01/1,121,220.34 = 449,902.87/x
  3. Step 3: Cross multiply
    812,479.01x = 1,121,220.34 × 449,902.87
  4. Step 4: Simplify right side
    812,479.01x = 504,440,248,868.38
  5. Step 5: Solve for x
    x = 504,440,248,868.38/812,479.01
  6. Step 6: Final answer
    x = 620,865.58

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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.