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Finding the Fourth Proportional to 290,396.59, 400,747.31 and 163,072.20

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Solution

The fourth proportional to 290,396.59, 400,747.31 and 163,072.20 is: 225,039.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,396.59 : 400,747.31 = 163,072.20 : x
  2. Step 2: Convert to fraction form
    290,396.59/400,747.31 = 163,072.20/x
  3. Step 3: Cross multiply
    290,396.59x = 400,747.31 × 163,072.20
  4. Step 4: Simplify right side
    290,396.59x = 65,350,745,485.78
  5. Step 5: Solve for x
    x = 65,350,745,485.78/290,396.59
  6. Step 6: Final answer
    x = 225,039.64

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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.