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Finding the Fourth Proportional to 1,778.31, 2,664.54 and 1,255.77

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Solution

The fourth proportional to 1,778.31, 2,664.54 and 1,255.77 is: 1,881.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.31 : 2,664.54 = 1,255.77 : x
  2. Step 2: Convert to fraction form
    1,778.31/2,664.54 = 1,255.77/x
  3. Step 3: Cross multiply
    1,778.31x = 2,664.54 × 1,255.77
  4. Step 4: Simplify right side
    1,778.31x = 3,346,049.40
  5. Step 5: Solve for x
    x = 3,346,049.40/1,778.31
  6. Step 6: Final answer
    x = 1,881.59

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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.