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Finding the Fourth Proportional to 1,720.84, 2,581.20 and 488.25

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Solution

The fourth proportional to 1,720.84, 2,581.20 and 488.25 is: 732.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,720.84 : 2,581.20 = 488.25 : x
  2. Step 2: Convert to fraction form
    1,720.84/2,581.20 = 488.25/x
  3. Step 3: Cross multiply
    1,720.84x = 2,581.20 × 488.25
  4. Step 4: Simplify right side
    1,720.84x = 1,260,270.90
  5. Step 5: Solve for x
    x = 1,260,270.90/1,720.84
  6. Step 6: Final answer
    x = 732.36

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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.