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Finding the Fourth Proportional to 611.01, 843.41 and 558.16

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Solution

The fourth proportional to 611.01, 843.41 and 558.16 is: 770.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.01 : 843.41 = 558.16 : x
  2. Step 2: Convert to fraction form
    611.01/843.41 = 558.16/x
  3. Step 3: Cross multiply
    611.01x = 843.41 × 558.16
  4. Step 4: Simplify right side
    611.01x = 470,757.01
  5. Step 5: Solve for x
    x = 470,757.01/611.01
  6. Step 6: Final answer
    x = 770.46

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