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Finding the Fourth Proportional to 849.21, 1,171.90 and 476.23

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Solution

The fourth proportional to 849.21, 1,171.90 and 476.23 is: 657.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.21 : 1,171.90 = 476.23 : x
  2. Step 2: Convert to fraction form
    849.21/1,171.90 = 476.23/x
  3. Step 3: Cross multiply
    849.21x = 1,171.90 × 476.23
  4. Step 4: Simplify right side
    849.21x = 558,091.56
  5. Step 5: Solve for x
    x = 558,091.56/849.21
  6. Step 6: Final answer
    x = 657.19

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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.