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Finding the Fourth Proportional to 849.67, 1,274.99 and 459.68

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Solution

The fourth proportional to 849.67, 1,274.99 and 459.68 is: 689.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.67 : 1,274.99 = 459.68 : x
  2. Step 2: Convert to fraction form
    849.67/1,274.99 = 459.68/x
  3. Step 3: Cross multiply
    849.67x = 1,274.99 × 459.68
  4. Step 4: Simplify right side
    849.67x = 586,078.73
  5. Step 5: Solve for x
    x = 586,078.73/849.67
  6. Step 6: Final answer
    x = 689.77

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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.