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Finding the Fourth Proportional to 1,720.29, 2,581.47 and 746.40

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Solution

The fourth proportional to 1,720.29, 2,581.47 and 746.40 is: 1,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.29 : 2,581.47 = 746.40 : x
  2. Step 2: Convert to fraction form
    1,720.29/2,581.47 = 746.40/x
  3. Step 3: Cross multiply
    1,720.29x = 2,581.47 × 746.40
  4. Step 4: Simplify right side
    1,720.29x = 1,926,809.21
  5. Step 5: Solve for x
    x = 1,926,809.21/1,720.29
  6. Step 6: Final answer
    x = 1,120.05

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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.