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Finding the Fourth Proportional to 290,243.99, 400,529.21 and 161,179.20

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Solution

The fourth proportional to 290,243.99, 400,529.21 and 161,179.20 is: 222,423.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,243.99 : 400,529.21 = 161,179.20 : x
  2. Step 2: Convert to fraction form
    290,243.99/400,529.21 = 161,179.20/x
  3. Step 3: Cross multiply
    290,243.99x = 400,529.21 × 161,179.20
  4. Step 4: Simplify right side
    290,243.99x = 64,556,976,838.54
  5. Step 5: Solve for x
    x = 64,556,976,838.54/290,243.99
  6. Step 6: Final answer
    x = 222,423.13

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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.