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Finding the Fourth Proportional to 290,020.20, 400,241.12 and 169,142.28

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Solution

The fourth proportional to 290,020.20, 400,241.12 and 169,142.28 is: 233,424.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,020.20 : 400,241.12 = 169,142.28 : x
  2. Step 2: Convert to fraction form
    290,020.20/400,241.12 = 169,142.28/x
  3. Step 3: Cross multiply
    290,020.20x = 400,241.12 × 169,142.28
  4. Step 4: Simplify right side
    290,020.20x = 67,697,695,586.55
  5. Step 5: Solve for x
    x = 67,697,695,586.55/290,020.20
  6. Step 6: Final answer
    x = 233,424.07

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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.