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Finding the Fourth Proportional to 1,027.94, 1,418.85 and 818.48

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Solution

The fourth proportional to 1,027.94, 1,418.85 and 818.48 is: 1,129.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,027.94 : 1,418.85 = 818.48 : x
  2. Step 2: Convert to fraction form
    1,027.94/1,418.85 = 818.48/x
  3. Step 3: Cross multiply
    1,027.94x = 1,418.85 × 818.48
  4. Step 4: Simplify right side
    1,027.94x = 1,161,300.35
  5. Step 5: Solve for x
    x = 1,161,300.35/1,027.94
  6. Step 6: Final answer
    x = 1,129.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.