Home / 1,620.46-2,235.99-921.82

Finding the Fourth Proportional to 1,620.46, 2,235.99 and 921.82

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Solution

The fourth proportional to 1,620.46, 2,235.99 and 921.82 is: 1,271.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.46 : 2,235.99 = 921.82 : x
  2. Step 2: Convert to fraction form
    1,620.46/2,235.99 = 921.82/x
  3. Step 3: Cross multiply
    1,620.46x = 2,235.99 × 921.82
  4. Step 4: Simplify right side
    1,620.46x = 2,061,180.30
  5. Step 5: Solve for x
    x = 2,061,180.30/1,620.46
  6. Step 6: Final answer
    x = 1,271.97

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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.