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Finding the Fourth Proportional to 290,170.39, 400,436.70 and 161,110.86

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Solution

The fourth proportional to 290,170.39, 400,436.70 and 161,110.86 is: 222,333.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,170.39 : 400,436.70 = 161,110.86 : x
  2. Step 2: Convert to fraction form
    290,170.39/400,436.70 = 161,110.86/x
  3. Step 3: Cross multiply
    290,170.39x = 400,436.70 × 161,110.86
  4. Step 4: Simplify right side
    290,170.39x = 64,514,699,110.38
  5. Step 5: Solve for x
    x = 64,514,699,110.38/290,170.39
  6. Step 6: Final answer
    x = 222,333.85

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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.