Home / 812,475.78-1,121,208.12-449,914.92

Finding the Fourth Proportional to 812,475.78, 1,121,208.12 and 449,914.92

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Solution

The fourth proportional to 812,475.78, 1,121,208.12 and 449,914.92 is: 620,877.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,475.78 : 1,121,208.12 = 449,914.92 : x
  2. Step 2: Convert to fraction form
    812,475.78/1,121,208.12 = 449,914.92/x
  3. Step 3: Cross multiply
    812,475.78x = 1,121,208.12 × 449,914.92
  4. Step 4: Simplify right side
    812,475.78x = 504,448,261,613.15
  5. Step 5: Solve for x
    x = 504,448,261,613.15/812,475.78
  6. Step 6: Final answer
    x = 620,877.91

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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.