Home / 1,645.25-2,269.26-981.59

Finding the Fourth Proportional to 1,645.25, 2,269.26 and 981.59

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Solution

The fourth proportional to 1,645.25, 2,269.26 and 981.59 is: 1,353.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,645.25 : 2,269.26 = 981.59 : x
  2. Step 2: Convert to fraction form
    1,645.25/2,269.26 = 981.59/x
  3. Step 3: Cross multiply
    1,645.25x = 2,269.26 × 981.59
  4. Step 4: Simplify right side
    1,645.25x = 2,227,471.58
  5. Step 5: Solve for x
    x = 2,227,471.58/1,645.25
  6. Step 6: Final answer
    x = 1,353.88

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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.