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Finding the Fourth Proportional to 1,818.88, 2,503.92 and 1,643.68

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Solution

The fourth proportional to 1,818.88, 2,503.92 and 1,643.68 is: 2,262.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,818.88 : 2,503.92 = 1,643.68 : x
  2. Step 2: Convert to fraction form
    1,818.88/2,503.92 = 1,643.68/x
  3. Step 3: Cross multiply
    1,818.88x = 2,503.92 × 1,643.68
  4. Step 4: Simplify right side
    1,818.88x = 4,115,643.23
  5. Step 5: Solve for x
    x = 4,115,643.23/1,818.88
  6. Step 6: Final answer
    x = 2,262.73

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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.