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Finding the Fourth Proportional to 849.87, 1,274 and 459.29

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Solution

The fourth proportional to 849.87, 1,274 and 459.29 is: 688.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.87 : 1,274 = 459.29 : x
  2. Step 2: Convert to fraction form
    849.87/1,274 = 459.29/x
  3. Step 3: Cross multiply
    849.87x = 1,274 × 459.29
  4. Step 4: Simplify right side
    849.87x = 585,129.09
  5. Step 5: Solve for x
    x = 585,129.09/849.87
  6. Step 6: Final answer
    x = 688.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.