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Finding the Fourth Proportional to 290,479.12, 400,853.20 and 161,414.28

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Solution

The fourth proportional to 290,479.12, 400,853.20 and 161,414.28 is: 222,747.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,479.12 : 400,853.20 = 161,414.28 : x
  2. Step 2: Convert to fraction form
    290,479.12/400,853.20 = 161,414.28/x
  3. Step 3: Cross multiply
    290,479.12x = 400,853.20 × 161,414.28
  4. Step 4: Simplify right side
    290,479.12x = 64,703,430,663.70
  5. Step 5: Solve for x
    x = 64,703,430,663.70/290,479.12
  6. Step 6: Final answer
    x = 222,747.27

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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.