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Finding the Fourth Proportional to 1,720.91, 2,579.92 and 746.28

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Solution

The fourth proportional to 1,720.91, 2,579.92 and 746.28 is: 1,118.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.91 : 2,579.92 = 746.28 : x
  2. Step 2: Convert to fraction form
    1,720.91/2,579.92 = 746.28/x
  3. Step 3: Cross multiply
    1,720.91x = 2,579.92 × 746.28
  4. Step 4: Simplify right side
    1,720.91x = 1,925,340.83
  5. Step 5: Solve for x
    x = 1,925,340.83/1,720.91
  6. Step 6: Final answer
    x = 1,118.79

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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.