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Finding the Fourth Proportional to 1,385, 2,077.61 and 563.33

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Solution

The fourth proportional to 1,385, 2,077.61 and 563.33 is: 845.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385 : 2,077.61 = 563.33 : x
  2. Step 2: Convert to fraction form
    1,385/2,077.61 = 563.33/x
  3. Step 3: Cross multiply
    1,385x = 2,077.61 × 563.33
  4. Step 4: Simplify right side
    1,385x = 1,170,380.04
  5. Step 5: Solve for x
    x = 1,170,380.04/1,385
  6. Step 6: Final answer
    x = 845.04

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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.