Home / 812,908.08-1,121,801.34-450,331.32

Finding the Fourth Proportional to 812,908.08, 1,121,801.34 and 450,331.32

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Solution

The fourth proportional to 812,908.08, 1,121,801.34 and 450,331.32 is: 621,450.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,908.08 : 1,121,801.34 = 450,331.32 : x
  2. Step 2: Convert to fraction form
    812,908.08/1,121,801.34 = 450,331.32/x
  3. Step 3: Cross multiply
    812,908.08x = 1,121,801.34 × 450,331.32
  4. Step 4: Simplify right side
    812,908.08x = 505,182,278,219.97
  5. Step 5: Solve for x
    x = 505,182,278,219.97/812,908.08
  6. Step 6: Final answer
    x = 621,450.68

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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.