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Finding the Fourth Proportional to 416.24, 623.46 and 278.96

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Solution

The fourth proportional to 416.24, 623.46 and 278.96 is: 417.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.24 : 623.46 = 278.96 : x
  2. Step 2: Convert to fraction form
    416.24/623.46 = 278.96/x
  3. Step 3: Cross multiply
    416.24x = 623.46 × 278.96
  4. Step 4: Simplify right side
    416.24x = 173,920.40
  5. Step 5: Solve for x
    x = 173,920.40/416.24
  6. Step 6: Final answer
    x = 417.84

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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.