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Finding the Fourth Proportional to 849.41, 1,172.61 and 648.60

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Solution

The fourth proportional to 849.41, 1,172.61 and 648.60 is: 895.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.41 : 1,172.61 = 648.60 : x
  2. Step 2: Convert to fraction form
    849.41/1,172.61 = 648.60/x
  3. Step 3: Cross multiply
    849.41x = 1,172.61 × 648.60
  4. Step 4: Simplify right side
    849.41x = 760,554.85
  5. Step 5: Solve for x
    x = 760,554.85/849.41
  6. Step 6: Final answer
    x = 895.40

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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.