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Finding the Fourth Proportional to 1,382.87, 2,072.94 and 560.63

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Solution

The fourth proportional to 1,382.87, 2,072.94 and 560.63 is: 840.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,382.87 : 2,072.94 = 560.63 : x
  2. Step 2: Convert to fraction form
    1,382.87/2,072.94 = 560.63/x
  3. Step 3: Cross multiply
    1,382.87x = 2,072.94 × 560.63
  4. Step 4: Simplify right side
    1,382.87x = 1,162,141.99
  5. Step 5: Solve for x
    x = 1,162,141.99/1,382.87
  6. Step 6: Final answer
    x = 840.39

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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.