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Finding the Fourth Proportional to 485,049.74, 669,368.24 and 281,219

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Solution

The fourth proportional to 485,049.74, 669,368.24 and 281,219 is: 388,081.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,049.74 : 669,368.24 = 281,219 : x
  2. Step 2: Convert to fraction form
    485,049.74/669,368.24 = 281,219/x
  3. Step 3: Cross multiply
    485,049.74x = 669,368.24 × 281,219
  4. Step 4: Simplify right side
    485,049.74x = 188,239,067,084.56
  5. Step 5: Solve for x
    x = 188,239,067,084.56/485,049.74
  6. Step 6: Final answer
    x = 388,081.99

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.