Home / 1,620.50-2,236.30-921.92

Finding the Fourth Proportional to 1,620.50, 2,236.30 and 921.92

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Solution

The fourth proportional to 1,620.50, 2,236.30 and 921.92 is: 1,272.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.50 : 2,236.30 = 921.92 : x
  2. Step 2: Convert to fraction form
    1,620.50/2,236.30 = 921.92/x
  3. Step 3: Cross multiply
    1,620.50x = 2,236.30 × 921.92
  4. Step 4: Simplify right side
    1,620.50x = 2,061,689.70
  5. Step 5: Solve for x
    x = 2,061,689.70/1,620.50
  6. Step 6: Final answer
    x = 1,272.26

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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.