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Finding the Fourth Proportional to 650.98, 976.86 and 419.68

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Solution

The fourth proportional to 650.98, 976.86 and 419.68 is: 629.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    650.98 : 976.86 = 419.68 : x
  2. Step 2: Convert to fraction form
    650.98/976.86 = 419.68/x
  3. Step 3: Cross multiply
    650.98x = 976.86 × 419.68
  4. Step 4: Simplify right side
    650.98x = 409,968.60
  5. Step 5: Solve for x
    x = 409,968.60/650.98
  6. Step 6: Final answer
    x = 629.77

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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.