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Finding the Fourth Proportional to 3,385.97, 5,078.80 and 1,410.78

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Solution

The fourth proportional to 3,385.97, 5,078.80 and 1,410.78 is: 2,116.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,385.97 : 5,078.80 = 1,410.78 : x
  2. Step 2: Convert to fraction form
    3,385.97/5,078.80 = 1,410.78/x
  3. Step 3: Cross multiply
    3,385.97x = 5,078.80 × 1,410.78
  4. Step 4: Simplify right side
    3,385.97x = 7,165,090.27
  5. Step 5: Solve for x
    x = 7,165,090.27/3,385.97
  6. Step 6: Final answer
    x = 2,116.11

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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.