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Finding the Fourth Proportional to 1,116.21, 1,673.78 and 499.92

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Solution

The fourth proportional to 1,116.21, 1,673.78 and 499.92 is: 749.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,116.21 : 1,673.78 = 499.92 : x
  2. Step 2: Convert to fraction form
    1,116.21/1,673.78 = 499.92/x
  3. Step 3: Cross multiply
    1,116.21x = 1,673.78 × 499.92
  4. Step 4: Simplify right side
    1,116.21x = 836,745.23
  5. Step 5: Solve for x
    x = 836,745.23/1,116.21
  6. Step 6: Final answer
    x = 749.63

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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.