Home / 1,618.31-2,231.85-1,020.13

Finding the Fourth Proportional to 1,618.31, 2,231.85 and 1,020.13

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Solution

The fourth proportional to 1,618.31, 2,231.85 and 1,020.13 is: 1,406.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,618.31 : 2,231.85 = 1,020.13 : x
  2. Step 2: Convert to fraction form
    1,618.31/2,231.85 = 1,020.13/x
  3. Step 3: Cross multiply
    1,618.31x = 2,231.85 × 1,020.13
  4. Step 4: Simplify right side
    1,618.31x = 2,276,775.39
  5. Step 5: Solve for x
    x = 2,276,775.39/1,618.31
  6. Step 6: Final answer
    x = 1,406.88

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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.