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Finding the Fourth Proportional to 823.49, 1,234.86 and 310.13

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Solution

The fourth proportional to 823.49, 1,234.86 and 310.13 is: 465.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.49 : 1,234.86 = 310.13 : x
  2. Step 2: Convert to fraction form
    823.49/1,234.86 = 310.13/x
  3. Step 3: Cross multiply
    823.49x = 1,234.86 × 310.13
  4. Step 4: Simplify right side
    823.49x = 382,967.13
  5. Step 5: Solve for x
    x = 382,967.13/823.49
  6. Step 6: Final answer
    x = 465.05

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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.