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Finding the Fourth Proportional to 812,796.53, 1,121,696.12 and 450,220.34

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Solution

The fourth proportional to 812,796.53, 1,121,696.12 and 450,220.34 is: 621,324.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,796.53 : 1,121,696.12 = 450,220.34 : x
  2. Step 2: Convert to fraction form
    812,796.53/1,121,696.12 = 450,220.34/x
  3. Step 3: Cross multiply
    812,796.53x = 1,121,696.12 × 450,220.34
  4. Step 4: Simplify right side
    812,796.53x = 505,010,406,143.33
  5. Step 5: Solve for x
    x = 505,010,406,143.33/812,796.53
  6. Step 6: Final answer
    x = 621,324.51

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Double scale
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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.