Home / 812,728.05-1,121,552.36-445,202.25

Finding the Fourth Proportional to 812,728.05, 1,121,552.36 and 445,202.25

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Solution

The fourth proportional to 812,728.05, 1,121,552.36 and 445,202.25 is: 614,372.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,728.05 : 1,121,552.36 = 445,202.25 : x
  2. Step 2: Convert to fraction form
    812,728.05/1,121,552.36 = 445,202.25/x
  3. Step 3: Cross multiply
    812,728.05x = 1,121,552.36 × 445,202.25
  4. Step 4: Simplify right side
    812,728.05x = 499,317,631,938.80
  5. Step 5: Solve for x
    x = 499,317,631,938.80/812,728.05
  6. Step 6: Final answer
    x = 614,372.34

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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.