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Finding the Fourth Proportional to 290,909.16, 436,363.83 and 91,245.15

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Solution

The fourth proportional to 290,909.16, 436,363.83 and 91,245.15 is: 136,867.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,909.16 : 436,363.83 = 91,245.15 : x
  2. Step 2: Convert to fraction form
    290,909.16/436,363.83 = 91,245.15/x
  3. Step 3: Cross multiply
    290,909.16x = 436,363.83 × 91,245.15
  4. Step 4: Simplify right side
    290,909.16x = 39,816,083,122.92
  5. Step 5: Solve for x
    x = 39,816,083,122.92/290,909.16
  6. Step 6: Final answer
    x = 136,867.75

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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.