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Finding the Fourth Proportional to 290,738.75, 436,108.24 and 91,074.65

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Solution

The fourth proportional to 290,738.75, 436,108.24 and 91,074.65 is: 136,612.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,738.75 : 436,108.24 = 91,074.65 : x
  2. Step 2: Convert to fraction form
    290,738.75/436,108.24 = 91,074.65/x
  3. Step 3: Cross multiply
    290,738.75x = 436,108.24 × 91,074.65
  4. Step 4: Simplify right side
    290,738.75x = 39,718,404,547.29
  5. Step 5: Solve for x
    x = 39,718,404,547.29/290,738.75
  6. Step 6: Final answer
    x = 136,612.01

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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.