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Finding the Fourth Proportional to 290,388.25, 400,740.51 and 161,335.05

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Solution

The fourth proportional to 290,388.25, 400,740.51 and 161,335.05 is: 222,644.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,388.25 : 400,740.51 = 161,335.05 : x
  2. Step 2: Convert to fraction form
    290,388.25/400,740.51 = 161,335.05/x
  3. Step 3: Cross multiply
    290,388.25x = 400,740.51 × 161,335.05
  4. Step 4: Simplify right side
    290,388.25x = 64,653,490,217.88
  5. Step 5: Solve for x
    x = 64,653,490,217.88/290,388.25
  6. Step 6: Final answer
    x = 222,644.99

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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.