Home / 3,113.19-4,669.70-921.96

Finding the Fourth Proportional to 3,113.19, 4,669.70 and 921.96

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Solution

The fourth proportional to 3,113.19, 4,669.70 and 921.96 is: 1,382.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,113.19 : 4,669.70 = 921.96 : x
  2. Step 2: Convert to fraction form
    3,113.19/4,669.70 = 921.96/x
  3. Step 3: Cross multiply
    3,113.19x = 4,669.70 × 921.96
  4. Step 4: Simplify right side
    3,113.19x = 4,305,272.00
  5. Step 5: Solve for x
    x = 4,305,272.00/3,113.19
  6. Step 6: Final answer
    x = 1,382.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.