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Finding the Fourth Proportional to 1,818.15, 2,728.03 and 663.63

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Solution

The fourth proportional to 1,818.15, 2,728.03 and 663.63 is: 995.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.15 : 2,728.03 = 663.63 : x
  2. Step 2: Convert to fraction form
    1,818.15/2,728.03 = 663.63/x
  3. Step 3: Cross multiply
    1,818.15x = 2,728.03 × 663.63
  4. Step 4: Simplify right side
    1,818.15x = 1,810,402.55
  5. Step 5: Solve for x
    x = 1,810,402.55/1,818.15
  6. Step 6: Final answer
    x = 995.74

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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.