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Finding the Fourth Proportional to 290,489.60, 435,734.40 and 231,003.20

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Solution

The fourth proportional to 290,489.60, 435,734.40 and 231,003.20 is: 346,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,489.60 : 435,734.40 = 231,003.20 : x
  2. Step 2: Convert to fraction form
    290,489.60/435,734.40 = 231,003.20/x
  3. Step 3: Cross multiply
    290,489.60x = 435,734.40 × 231,003.20
  4. Step 4: Simplify right side
    290,489.60x = 100,656,040,750.08
  5. Step 5: Solve for x
    x = 100,656,040,750.08/290,489.60
  6. Step 6: Final answer
    x = 346,504.80

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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.