Home / 1,228.67-1,695.92-1,008.15

Finding the Fourth Proportional to 1,228.67, 1,695.92 and 1,008.15

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Solution

The fourth proportional to 1,228.67, 1,695.92 and 1,008.15 is: 1,391.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.67 : 1,695.92 = 1,008.15 : x
  2. Step 2: Convert to fraction form
    1,228.67/1,695.92 = 1,008.15/x
  3. Step 3: Cross multiply
    1,228.67x = 1,695.92 × 1,008.15
  4. Step 4: Simplify right side
    1,228.67x = 1,709,736.71
  5. Step 5: Solve for x
    x = 1,709,736.71/1,228.67
  6. Step 6: Final answer
    x = 1,391.54

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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.