Home / 1,235.31-1,851.60-1,089.21

Finding the Fourth Proportional to 1,235.31, 1,851.60 and 1,089.21

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Solution

The fourth proportional to 1,235.31, 1,851.60 and 1,089.21 is: 1,632.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.31 : 1,851.60 = 1,089.21 : x
  2. Step 2: Convert to fraction form
    1,235.31/1,851.60 = 1,089.21/x
  3. Step 3: Cross multiply
    1,235.31x = 1,851.60 × 1,089.21
  4. Step 4: Simplify right side
    1,235.31x = 2,016,781.24
  5. Step 5: Solve for x
    x = 2,016,781.24/1,235.31
  6. Step 6: Final answer
    x = 1,632.61

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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.