Home / 1,721.52-2,564.70-1,638.90

Finding the Fourth Proportional to 1,721.52, 2,564.70 and 1,638.90

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Solution

The fourth proportional to 1,721.52, 2,564.70 and 1,638.90 is: 2,441.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,721.52 : 2,564.70 = 1,638.90 : x
  2. Step 2: Convert to fraction form
    1,721.52/2,564.70 = 1,638.90/x
  3. Step 3: Cross multiply
    1,721.52x = 2,564.70 × 1,638.90
  4. Step 4: Simplify right side
    1,721.52x = 4,203,286.83
  5. Step 5: Solve for x
    x = 4,203,286.83/1,721.52
  6. Step 6: Final answer
    x = 2,441.61

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.