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Finding the Fourth Proportional to 290,512.72, 435,781.41 and 90,836.83

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Solution

The fourth proportional to 290,512.72, 435,781.41 and 90,836.83 is: 136,259.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,512.72 : 435,781.41 = 90,836.83 : x
  2. Step 2: Convert to fraction form
    290,512.72/435,781.41 = 90,836.83/x
  3. Step 3: Cross multiply
    290,512.72x = 435,781.41 × 90,836.83
  4. Step 4: Simplify right side
    290,512.72x = 39,585,001,857.33
  5. Step 5: Solve for x
    x = 39,585,001,857.33/290,512.72
  6. Step 6: Final answer
    x = 136,259.10

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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.