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Finding the Fourth Proportional to 849.19, 1,172.04 and 553.94

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Solution

The fourth proportional to 849.19, 1,172.04 and 553.94 is: 764.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.19 : 1,172.04 = 553.94 : x
  2. Step 2: Convert to fraction form
    849.19/1,172.04 = 553.94/x
  3. Step 3: Cross multiply
    849.19x = 1,172.04 × 553.94
  4. Step 4: Simplify right side
    849.19x = 649,239.84
  5. Step 5: Solve for x
    x = 649,239.84/849.19
  6. Step 6: Final answer
    x = 764.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.