Home / 1,587.14-2,190.22-878.96

Finding the Fourth Proportional to 1,587.14, 2,190.22 and 878.96

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Solution

The fourth proportional to 1,587.14, 2,190.22 and 878.96 is: 1,212.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.14 : 2,190.22 = 878.96 : x
  2. Step 2: Convert to fraction form
    1,587.14/2,190.22 = 878.96/x
  3. Step 3: Cross multiply
    1,587.14x = 2,190.22 × 878.96
  4. Step 4: Simplify right side
    1,587.14x = 1,925,108.58
  5. Step 5: Solve for x
    x = 1,925,108.58/1,587.14
  6. Step 6: Final answer
    x = 1,212.94

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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.