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Finding the Fourth Proportional to 290,885.78, 401,225.05 and 188,728.73

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Solution

The fourth proportional to 290,885.78, 401,225.05 and 188,728.73 is: 260,317.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,885.78 : 401,225.05 = 188,728.73 : x
  2. Step 2: Convert to fraction form
    290,885.78/401,225.05 = 188,728.73/x
  3. Step 3: Cross multiply
    290,885.78x = 401,225.05 × 188,728.73
  4. Step 4: Simplify right side
    290,885.78x = 75,722,695,060.36
  5. Step 5: Solve for x
    x = 75,722,695,060.36/290,885.78
  6. Step 6: Final answer
    x = 260,317.62

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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.