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Finding the Fourth Proportional to 849.49, 1,173.49 and 655.49

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Solution

The fourth proportional to 849.49, 1,173.49 and 655.49 is: 905.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.49 : 1,173.49 = 655.49 : x
  2. Step 2: Convert to fraction form
    849.49/1,173.49 = 655.49/x
  3. Step 3: Cross multiply
    849.49x = 1,173.49 × 655.49
  4. Step 4: Simplify right side
    849.49x = 769,212.26
  5. Step 5: Solve for x
    x = 769,212.26/849.49
  6. Step 6: Final answer
    x = 905.50

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1.5x scale

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.