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Finding the Fourth Proportional to 290,462.40, 436,665.60 and 251,971.20

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Solution

The fourth proportional to 290,462.40, 436,665.60 and 251,971.20 is: 378,799.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,462.40 : 436,665.60 = 251,971.20 : x
  2. Step 2: Convert to fraction form
    290,462.40/436,665.60 = 251,971.20/x
  3. Step 3: Cross multiply
    290,462.40x = 436,665.60 × 251,971.20
  4. Step 4: Simplify right side
    290,462.40x = 110,027,155,230.72
  5. Step 5: Solve for x
    x = 110,027,155,230.72/290,462.40
  6. Step 6: Final answer
    x = 378,799.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.