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Finding the Fourth Proportional to 1,720.66, 2,581.26 and 746.86

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Solution

The fourth proportional to 1,720.66, 2,581.26 and 746.86 is: 1,120.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.66 : 2,581.26 = 746.86 : x
  2. Step 2: Convert to fraction form
    1,720.66/2,581.26 = 746.86/x
  3. Step 3: Cross multiply
    1,720.66x = 2,581.26 × 746.86
  4. Step 4: Simplify right side
    1,720.66x = 1,927,839.84
  5. Step 5: Solve for x
    x = 1,927,839.84/1,720.66
  6. Step 6: Final answer
    x = 1,120.41

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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.