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Finding the Fourth Proportional to 416.10, 624.15 and 279.30

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Solution

The fourth proportional to 416.10, 624.15 and 279.30 is: 418.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.10 : 624.15 = 279.30 : x
  2. Step 2: Convert to fraction form
    416.10/624.15 = 279.30/x
  3. Step 3: Cross multiply
    416.10x = 624.15 × 279.30
  4. Step 4: Simplify right side
    416.10x = 174,325.10
  5. Step 5: Solve for x
    x = 174,325.10/416.10
  6. Step 6: Final answer
    x = 418.95

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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.