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Finding the Fourth Proportional to 290,436.44, 400,807.43 and 161,386.83

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Solution

The fourth proportional to 290,436.44, 400,807.43 and 161,386.83 is: 222,716.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,436.44 : 400,807.43 = 161,386.83 : x
  2. Step 2: Convert to fraction form
    290,436.44/400,807.43 = 161,386.83/x
  3. Step 3: Cross multiply
    290,436.44x = 400,807.43 × 161,386.83
  4. Step 4: Simplify right side
    290,436.44x = 64,685,039,761.21
  5. Step 5: Solve for x
    x = 64,685,039,761.21/290,436.44
  6. Step 6: Final answer
    x = 222,716.68

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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.