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Finding the Fourth Proportional to 656.83, 984.55 and 331.51

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Solution

The fourth proportional to 656.83, 984.55 and 331.51 is: 496.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.83 : 984.55 = 331.51 : x
  2. Step 2: Convert to fraction form
    656.83/984.55 = 331.51/x
  3. Step 3: Cross multiply
    656.83x = 984.55 × 331.51
  4. Step 4: Simplify right side
    656.83x = 326,388.17
  5. Step 5: Solve for x
    x = 326,388.17/656.83
  6. Step 6: Final answer
    x = 496.91

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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.