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Finding the Fourth Proportional to 859.17, 1,185.54 and 481.05

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Solution

The fourth proportional to 859.17, 1,185.54 and 481.05 is: 663.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.17 : 1,185.54 = 481.05 : x
  2. Step 2: Convert to fraction form
    859.17/1,185.54 = 481.05/x
  3. Step 3: Cross multiply
    859.17x = 1,185.54 × 481.05
  4. Step 4: Simplify right side
    859.17x = 570,304.02
  5. Step 5: Solve for x
    x = 570,304.02/859.17
  6. Step 6: Final answer
    x = 663.78

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Double scale
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1.5x scale

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.