Home / 1,553.64-2,143.92-1,222.92

Finding the Fourth Proportional to 1,553.64, 2,143.92 and 1,222.92

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Solution

The fourth proportional to 1,553.64, 2,143.92 and 1,222.92 is: 1,687.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.64 : 2,143.92 = 1,222.92 : x
  2. Step 2: Convert to fraction form
    1,553.64/2,143.92 = 1,222.92/x
  3. Step 3: Cross multiply
    1,553.64x = 2,143.92 × 1,222.92
  4. Step 4: Simplify right side
    1,553.64x = 2,621,842.65
  5. Step 5: Solve for x
    x = 2,621,842.65/1,553.64
  6. Step 6: Final answer
    x = 1,687.55

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1.5x scale

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.