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Finding the Fourth Proportional to 290,221.48, 400,492.18 and 161,168.15

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Solution

The fourth proportional to 290,221.48, 400,492.18 and 161,168.15 is: 222,404.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,221.48 : 400,492.18 = 161,168.15 : x
  2. Step 2: Convert to fraction form
    290,221.48/400,492.18 = 161,168.15/x
  3. Step 3: Cross multiply
    290,221.48x = 400,492.18 × 161,168.15
  4. Step 4: Simplify right side
    290,221.48x = 64,546,581,290.20
  5. Step 5: Solve for x
    x = 64,546,581,290.20/290,221.48
  6. Step 6: Final answer
    x = 222,404.56

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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.