Home / 1,112.12-1,534.92-646.36

Finding the Fourth Proportional to 1,112.12, 1,534.92 and 646.36

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Solution

The fourth proportional to 1,112.12, 1,534.92 and 646.36 is: 892.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,112.12 : 1,534.92 = 646.36 : x
  2. Step 2: Convert to fraction form
    1,112.12/1,534.92 = 646.36/x
  3. Step 3: Cross multiply
    1,112.12x = 1,534.92 × 646.36
  4. Step 4: Simplify right side
    1,112.12x = 992,110.89
  5. Step 5: Solve for x
    x = 992,110.89/1,112.12
  6. Step 6: Final answer
    x = 892.09

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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.