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Finding the Fourth Proportional to 290,670.72, 401,235.20 and 169,851.28

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Solution

The fourth proportional to 290,670.72, 401,235.20 and 169,851.28 is: 234,458.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,670.72 : 401,235.20 = 169,851.28 : x
  2. Step 2: Convert to fraction form
    290,670.72/401,235.20 = 169,851.28/x
  3. Step 3: Cross multiply
    290,670.72x = 401,235.20 × 169,851.28
  4. Step 4: Simplify right side
    290,670.72x = 68,150,311,722.60
  5. Step 5: Solve for x
    x = 68,150,311,722.60/290,670.72
  6. Step 6: Final answer
    x = 234,458.81

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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.