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Finding the Fourth Proportional to 656.07, 984.78 and 309.68

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Solution

The fourth proportional to 656.07, 984.78 and 309.68 is: 464.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.07 : 984.78 = 309.68 : x
  2. Step 2: Convert to fraction form
    656.07/984.78 = 309.68/x
  3. Step 3: Cross multiply
    656.07x = 984.78 × 309.68
  4. Step 4: Simplify right side
    656.07x = 304,961.75
  5. Step 5: Solve for x
    x = 304,961.75/656.07
  6. Step 6: Final answer
    x = 464.83

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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.