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Finding the Fourth Proportional to 522.82, 784.45 and 279.28

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Solution

The fourth proportional to 522.82, 784.45 and 279.28 is: 419.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.82 : 784.45 = 279.28 : x
  2. Step 2: Convert to fraction form
    522.82/784.45 = 279.28/x
  3. Step 3: Cross multiply
    522.82x = 784.45 × 279.28
  4. Step 4: Simplify right side
    522.82x = 219,082.53
  5. Step 5: Solve for x
    x = 219,082.53/522.82
  6. Step 6: Final answer
    x = 419.04

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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.