Home / 1,285.70-1,769.64-1,098.56

Finding the Fourth Proportional to 1,285.70, 1,769.64 and 1,098.56

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Solution

The fourth proportional to 1,285.70, 1,769.64 and 1,098.56 is: 1,512.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.70 : 1,769.64 = 1,098.56 : x
  2. Step 2: Convert to fraction form
    1,285.70/1,769.64 = 1,098.56/x
  3. Step 3: Cross multiply
    1,285.70x = 1,769.64 × 1,098.56
  4. Step 4: Simplify right side
    1,285.70x = 1,944,055.72
  5. Step 5: Solve for x
    x = 1,944,055.72/1,285.70
  6. Step 6: Final answer
    x = 1,512.06

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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.