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Finding the Fourth Proportional to 522.76, 784.54 and 279.36

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Solution

The fourth proportional to 522.76, 784.54 and 279.36 is: 419.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.76 : 784.54 = 279.36 : x
  2. Step 2: Convert to fraction form
    522.76/784.54 = 279.36/x
  3. Step 3: Cross multiply
    522.76x = 784.54 × 279.36
  4. Step 4: Simplify right side
    522.76x = 219,169.09
  5. Step 5: Solve for x
    x = 219,169.09/522.76
  6. Step 6: Final answer
    x = 419.25

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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.