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Finding the Fourth Proportional to 281,010.60, 421,515.90 and 279,042.30

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Solution

The fourth proportional to 281,010.60, 421,515.90 and 279,042.30 is: 418,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,010.60 : 421,515.90 = 279,042.30 : x
  2. Step 2: Convert to fraction form
    281,010.60/421,515.90 = 279,042.30/x
  3. Step 3: Cross multiply
    281,010.60x = 421,515.90 × 279,042.30
  4. Step 4: Simplify right side
    281,010.60x = 117,620,766,222.57
  5. Step 5: Solve for x
    x = 117,620,766,222.57/281,010.60
  6. Step 6: Final answer
    x = 418,563.45

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1.5x scale

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.