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Finding the Fourth Proportional to 1,663.22, 2,494.55 and 493.20

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Solution

The fourth proportional to 1,663.22, 2,494.55 and 493.20 is: 739.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.22 : 2,494.55 = 493.20 : x
  2. Step 2: Convert to fraction form
    1,663.22/2,494.55 = 493.20/x
  3. Step 3: Cross multiply
    1,663.22x = 2,494.55 × 493.20
  4. Step 4: Simplify right side
    1,663.22x = 1,230,309.59
  5. Step 5: Solve for x
    x = 1,230,309.59/1,663.22
  6. Step 6: Final answer
    x = 739.72

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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.