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Finding the Fourth Proportional to 416.30, 623.19 and 254.30

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Solution

The fourth proportional to 416.30, 623.19 and 254.30 is: 380.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.30 : 623.19 = 254.30 : x
  2. Step 2: Convert to fraction form
    416.30/623.19 = 254.30/x
  3. Step 3: Cross multiply
    416.30x = 623.19 × 254.30
  4. Step 4: Simplify right side
    416.30x = 158,477.22
  5. Step 5: Solve for x
    x = 158,477.22/416.30
  6. Step 6: Final answer
    x = 380.68

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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.