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Finding the Fourth Proportional to 979.35, 1,465.53 and 850.88

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Solution

The fourth proportional to 979.35, 1,465.53 and 850.88 is: 1,273.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    979.35 : 1,465.53 = 850.88 : x
  2. Step 2: Convert to fraction form
    979.35/1,465.53 = 850.88/x
  3. Step 3: Cross multiply
    979.35x = 1,465.53 × 850.88
  4. Step 4: Simplify right side
    979.35x = 1,246,982.84
  5. Step 5: Solve for x
    x = 1,246,982.84/979.35
  6. Step 6: Final answer
    x = 1,273.28

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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.