Home / 1,228.92-1,694.70-1,042.20

Finding the Fourth Proportional to 1,228.92, 1,694.70 and 1,042.20

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Solution

The fourth proportional to 1,228.92, 1,694.70 and 1,042.20 is: 1,437.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,228.92 : 1,694.70 = 1,042.20 : x
  2. Step 2: Convert to fraction form
    1,228.92/1,694.70 = 1,042.20/x
  3. Step 3: Cross multiply
    1,228.92x = 1,694.70 × 1,042.20
  4. Step 4: Simplify right side
    1,228.92x = 1,766,216.34
  5. Step 5: Solve for x
    x = 1,766,216.34/1,228.92
  6. Step 6: Final answer
    x = 1,437.21

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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.