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Finding the Fourth Proportional to 290,058.76, 400,305.20 and 161,009.36

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Solution

The fourth proportional to 290,058.76, 400,305.20 and 161,009.36 is: 222,206.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,058.76 : 400,305.20 = 161,009.36 : x
  2. Step 2: Convert to fraction form
    290,058.76/400,305.20 = 161,009.36/x
  3. Step 3: Cross multiply
    290,058.76x = 400,305.20 × 161,009.36
  4. Step 4: Simplify right side
    290,058.76x = 64,452,882,055.15
  5. Step 5: Solve for x
    x = 64,452,882,055.15/290,058.76
  6. Step 6: Final answer
    x = 222,206.29

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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.