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Finding the Fourth Proportional to 290,370.87, 400,641.69 and 169,443.13

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Solution

The fourth proportional to 290,370.87, 400,641.69 and 169,443.13 is: 233,790.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,370.87 : 400,641.69 = 169,443.13 : x
  2. Step 2: Convert to fraction form
    290,370.87/400,641.69 = 169,443.13/x
  3. Step 3: Cross multiply
    290,370.87x = 400,641.69 × 169,443.13
  4. Step 4: Simplify right side
    290,370.87x = 67,885,981,962.09
  5. Step 5: Solve for x
    x = 67,885,981,962.09/290,370.87
  6. Step 6: Final answer
    x = 233,790.61

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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.