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Finding the Fourth Proportional to 416.13, 623.84 and 278.75

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Solution

The fourth proportional to 416.13, 623.84 and 278.75 is: 417.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    416.13 : 623.84 = 278.75 : x
  2. Step 2: Convert to fraction form
    416.13/623.84 = 278.75/x
  3. Step 3: Cross multiply
    416.13x = 623.84 × 278.75
  4. Step 4: Simplify right side
    416.13x = 173,894.01
  5. Step 5: Solve for x
    x = 173,894.01/416.13
  6. Step 6: Final answer
    x = 417.89

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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.