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Finding the Fourth Proportional to 290,484.16, 400,859.42 and 161,422.20

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Solution

The fourth proportional to 290,484.16, 400,859.42 and 161,422.20 is: 222,757.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,484.16 : 400,859.42 = 161,422.20 : x
  2. Step 2: Convert to fraction form
    290,484.16/400,859.42 = 161,422.20/x
  3. Step 3: Cross multiply
    290,484.16x = 400,859.42 × 161,422.20
  4. Step 4: Simplify right side
    290,484.16x = 64,707,608,660.01
  5. Step 5: Solve for x
    x = 64,707,608,660.01/290,484.16
  6. Step 6: Final answer
    x = 222,757.79

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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.