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Finding the Fourth Proportional to 416.36, 623.31 and 279.08

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Solution

The fourth proportional to 416.36, 623.31 and 279.08 is: 417.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.36 : 623.31 = 279.08 : x
  2. Step 2: Convert to fraction form
    416.36/623.31 = 279.08/x
  3. Step 3: Cross multiply
    416.36x = 623.31 × 279.08
  4. Step 4: Simplify right side
    416.36x = 173,953.35
  5. Step 5: Solve for x
    x = 173,953.35/416.36
  6. Step 6: Final answer
    x = 417.80

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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.