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Finding the Fourth Proportional to 823.02, 1,234.55 and 275.21

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Solution

The fourth proportional to 823.02, 1,234.55 and 275.21 is: 412.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.02 : 1,234.55 = 275.21 : x
  2. Step 2: Convert to fraction form
    823.02/1,234.55 = 275.21/x
  3. Step 3: Cross multiply
    823.02x = 1,234.55 × 275.21
  4. Step 4: Simplify right side
    823.02x = 339,752.96
  5. Step 5: Solve for x
    x = 339,752.96/823.02
  6. Step 6: Final answer
    x = 412.81

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Double scale
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1.5x scale

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.