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Finding the Fourth Proportional to 823.24, 1,234.86 and 481

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Solution

The fourth proportional to 823.24, 1,234.86 and 481 is: 721.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.24 : 1,234.86 = 481 : x
  2. Step 2: Convert to fraction form
    823.24/1,234.86 = 481/x
  3. Step 3: Cross multiply
    823.24x = 1,234.86 × 481
  4. Step 4: Simplify right side
    823.24x = 593,967.66
  5. Step 5: Solve for x
    x = 593,967.66/823.24
  6. Step 6: Final answer
    x = 721.50

Related Problems

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Double scale
Find fourth proportional to 824.24, 1,236.36 and 482
Similar ratio
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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.