Home / 1,112.02-1,534.43-639.73

Finding the Fourth Proportional to 1,112.02, 1,534.43 and 639.73

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Solution

The fourth proportional to 1,112.02, 1,534.43 and 639.73 is: 882.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.02 : 1,534.43 = 639.73 : x
  2. Step 2: Convert to fraction form
    1,112.02/1,534.43 = 639.73/x
  3. Step 3: Cross multiply
    1,112.02x = 1,534.43 × 639.73
  4. Step 4: Simplify right side
    1,112.02x = 981,619.62
  5. Step 5: Solve for x
    x = 981,619.62/1,112.02
  6. Step 6: Final answer
    x = 882.74

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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.