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Finding the Fourth Proportional to 553.58, 828.84 and 279.10

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Solution

The fourth proportional to 553.58, 828.84 and 279.10 is: 417.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.58 : 828.84 = 279.10 : x
  2. Step 2: Convert to fraction form
    553.58/828.84 = 279.10/x
  3. Step 3: Cross multiply
    553.58x = 828.84 × 279.10
  4. Step 4: Simplify right side
    553.58x = 231,327.91
  5. Step 5: Solve for x
    x = 231,327.91/553.58
  6. Step 6: Final answer
    x = 417.87

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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.