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Finding the Fourth Proportional to 1,449.54, 2,172.75 and 717.54

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Solution

The fourth proportional to 1,449.54, 2,172.75 and 717.54 is: 1,075.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,449.54 : 2,172.75 = 717.54 : x
  2. Step 2: Convert to fraction form
    1,449.54/2,172.75 = 717.54/x
  3. Step 3: Cross multiply
    1,449.54x = 2,172.75 × 717.54
  4. Step 4: Simplify right side
    1,449.54x = 1,559,035.04
  5. Step 5: Solve for x
    x = 1,559,035.04/1,449.54
  6. Step 6: Final answer
    x = 1,075.54

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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.