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Finding the Fourth Proportional to 279,803.88, 419,765.79 and 90,275.04

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Solution

The fourth proportional to 279,803.88, 419,765.79 and 90,275.04 is: 135,431.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,803.88 : 419,765.79 = 90,275.04 : x
  2. Step 2: Convert to fraction form
    279,803.88/419,765.79 = 90,275.04/x
  3. Step 3: Cross multiply
    279,803.88x = 419,765.79 × 90,275.04
  4. Step 4: Simplify right side
    279,803.88x = 37,894,373,482.88
  5. Step 5: Solve for x
    x = 37,894,373,482.88/279,803.88
  6. Step 6: Final answer
    x = 135,431.91

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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.