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Finding the Fourth Proportional to 280,836.30, 421,254.45 and 252,842.70

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Solution

The fourth proportional to 280,836.30, 421,254.45 and 252,842.70 is: 379,264.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,836.30 : 421,254.45 = 252,842.70 : x
  2. Step 2: Convert to fraction form
    280,836.30/421,254.45 = 252,842.70/x
  3. Step 3: Cross multiply
    280,836.30x = 421,254.45 × 252,842.70
  4. Step 4: Simplify right side
    280,836.30x = 106,511,112,525.02
  5. Step 5: Solve for x
    x = 106,511,112,525.02/280,836.30
  6. Step 6: Final answer
    x = 379,264.05

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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.