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Finding the Fourth Proportional to 822.90, 1,234.98 and 336.36

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Solution

The fourth proportional to 822.90, 1,234.98 and 336.36 is: 504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.90 : 1,234.98 = 336.36 : x
  2. Step 2: Convert to fraction form
    822.90/1,234.98 = 336.36/x
  3. Step 3: Cross multiply
    822.90x = 1,234.98 × 336.36
  4. Step 4: Simplify right side
    822.90x = 415,397.87
  5. Step 5: Solve for x
    x = 415,397.87/822.90
  6. Step 6: Final answer
    x = 504.80

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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.