Home / 812,480.13-1,121,208.78-449,896.20

Finding the Fourth Proportional to 812,480.13, 1,121,208.78 and 449,896.20

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Solution

The fourth proportional to 812,480.13, 1,121,208.78 and 449,896.20 is: 620,849.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,480.13 : 1,121,208.78 = 449,896.20 : x
  2. Step 2: Convert to fraction form
    812,480.13/1,121,208.78 = 449,896.20/x
  3. Step 3: Cross multiply
    812,480.13x = 1,121,208.78 × 449,896.20
  4. Step 4: Simplify right side
    812,480.13x = 504,427,569,528.64
  5. Step 5: Solve for x
    x = 504,427,569,528.64/812,480.13
  6. Step 6: Final answer
    x = 620,849.11

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Half scale
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Double scale
Find fourth proportional to 812,481.13, 1,121,210.16 and 449,897.20
Similar ratio
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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.