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Finding the Fourth Proportional to 821.69, 1,133.99 and 467.54

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Solution

The fourth proportional to 821.69, 1,133.99 and 467.54 is: 645.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.69 : 1,133.99 = 467.54 : x
  2. Step 2: Convert to fraction form
    821.69/1,133.99 = 467.54/x
  3. Step 3: Cross multiply
    821.69x = 1,133.99 × 467.54
  4. Step 4: Simplify right side
    821.69x = 530,185.68
  5. Step 5: Solve for x
    x = 530,185.68/821.69
  6. Step 6: Final answer
    x = 645.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.