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Finding the Fourth Proportional to 523.21, 783.96 and 279.76

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Solution

The fourth proportional to 523.21, 783.96 and 279.76 is: 419.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    523.21 : 783.96 = 279.76 : x
  2. Step 2: Convert to fraction form
    523.21/783.96 = 279.76/x
  3. Step 3: Cross multiply
    523.21x = 783.96 × 279.76
  4. Step 4: Simplify right side
    523.21x = 219,320.65
  5. Step 5: Solve for x
    x = 219,320.65/523.21
  6. Step 6: Final answer
    x = 419.18

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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.