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Finding the Fourth Proportional to 488.79, 733.05 and 245.21

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Solution

The fourth proportional to 488.79, 733.05 and 245.21 is: 367.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.79 : 733.05 = 245.21 : x
  2. Step 2: Convert to fraction form
    488.79/733.05 = 245.21/x
  3. Step 3: Cross multiply
    488.79x = 733.05 × 245.21
  4. Step 4: Simplify right side
    488.79x = 179,747.53
  5. Step 5: Solve for x
    x = 179,747.53/488.79
  6. Step 6: Final answer
    x = 367.74

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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.