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Finding the Fourth Proportional to 849.38, 1,172.12 and 476.39

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Solution

The fourth proportional to 849.38, 1,172.12 and 476.39 is: 657.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.38 : 1,172.12 = 476.39 : x
  2. Step 2: Convert to fraction form
    849.38/1,172.12 = 476.39/x
  3. Step 3: Cross multiply
    849.38x = 1,172.12 × 476.39
  4. Step 4: Simplify right side
    849.38x = 558,386.80
  5. Step 5: Solve for x
    x = 558,386.80/849.38
  6. Step 6: Final answer
    x = 657.41

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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.