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Finding the Fourth Proportional to 850.15, 1,274.42 and 459.56

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Solution

The fourth proportional to 850.15, 1,274.42 and 459.56 is: 688.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    850.15 : 1,274.42 = 459.56 : x
  2. Step 2: Convert to fraction form
    850.15/1,274.42 = 459.56/x
  3. Step 3: Cross multiply
    850.15x = 1,274.42 × 459.56
  4. Step 4: Simplify right side
    850.15x = 585,670.16
  5. Step 5: Solve for x
    x = 585,670.16/850.15
  6. Step 6: Final answer
    x = 688.91

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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.