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Finding the Fourth Proportional to 277.72, 416.60 and 72.30

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Solution

The fourth proportional to 277.72, 416.60 and 72.30 is: 108.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.72 : 416.60 = 72.30 : x
  2. Step 2: Convert to fraction form
    277.72/416.60 = 72.30/x
  3. Step 3: Cross multiply
    277.72x = 416.60 × 72.30
  4. Step 4: Simplify right side
    277.72x = 30,120.18
  5. Step 5: Solve for x
    x = 30,120.18/277.72
  6. Step 6: Final answer
    x = 108.46

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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.