Home / 812,503.89-1,121,145.38-449,918.42

Finding the Fourth Proportional to 812,503.89, 1,121,145.38 and 449,918.42

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Solution

The fourth proportional to 812,503.89, 1,121,145.38 and 449,918.42 is: 620,826.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,503.89 : 1,121,145.38 = 449,918.42 : x
  2. Step 2: Convert to fraction form
    812,503.89/1,121,145.38 = 449,918.42/x
  3. Step 3: Cross multiply
    812,503.89x = 1,121,145.38 × 449,918.42
  4. Step 4: Simplify right side
    812,503.89x = 504,423,957,959.90
  5. Step 5: Solve for x
    x = 504,423,957,959.90/812,503.89
  6. Step 6: Final answer
    x = 620,826.51

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Double scale
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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.