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Finding the Fourth Proportional to 849.11, 1,172.00 and 518.13

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Solution

The fourth proportional to 849.11, 1,172.00 and 518.13 is: 715.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.11 : 1,172.00 = 518.13 : x
  2. Step 2: Convert to fraction form
    849.11/1,172.00 = 518.13/x
  3. Step 3: Cross multiply
    849.11x = 1,172.00 × 518.13
  4. Step 4: Simplify right side
    849.11x = 607,249.66
  5. Step 5: Solve for x
    x = 607,249.66/849.11
  6. Step 6: Final answer
    x = 715.16

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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.