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Finding the Fourth Proportional to 867.50, 1,299.59 and 481.94

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Solution

The fourth proportional to 867.50, 1,299.59 and 481.94 is: 721.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.50 : 1,299.59 = 481.94 : x
  2. Step 2: Convert to fraction form
    867.50/1,299.59 = 481.94/x
  3. Step 3: Cross multiply
    867.50x = 1,299.59 × 481.94
  4. Step 4: Simplify right side
    867.50x = 626,324.40
  5. Step 5: Solve for x
    x = 626,324.40/867.50
  6. Step 6: Final answer
    x = 721.99

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Double scale
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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.