Home / 1,385.36-2,078.60-563.70

Finding the Fourth Proportional to 1,385.36, 2,078.60 and 563.70

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Solution

The fourth proportional to 1,385.36, 2,078.60 and 563.70 is: 845.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.36 : 2,078.60 = 563.70 : x
  2. Step 2: Convert to fraction form
    1,385.36/2,078.60 = 563.70/x
  3. Step 3: Cross multiply
    1,385.36x = 2,078.60 × 563.70
  4. Step 4: Simplify right side
    1,385.36x = 1,171,706.82
  5. Step 5: Solve for x
    x = 1,171,706.82/1,385.36
  6. Step 6: Final answer
    x = 845.78

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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.