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Finding the Fourth Proportional to 611.84, 917.21 and 246.38

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Solution

The fourth proportional to 611.84, 917.21 and 246.38 is: 369.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.84 : 917.21 = 246.38 : x
  2. Step 2: Convert to fraction form
    611.84/917.21 = 246.38/x
  3. Step 3: Cross multiply
    611.84x = 917.21 × 246.38
  4. Step 4: Simplify right side
    611.84x = 225,978.23
  5. Step 5: Solve for x
    x = 225,978.23/611.84
  6. Step 6: Final answer
    x = 369.34

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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.