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Finding the Fourth Proportional to 577.56, 866.46 and 285.05

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Solution

The fourth proportional to 577.56, 866.46 and 285.05 is: 427.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.56 : 866.46 = 285.05 : x
  2. Step 2: Convert to fraction form
    577.56/866.46 = 285.05/x
  3. Step 3: Cross multiply
    577.56x = 866.46 × 285.05
  4. Step 4: Simplify right side
    577.56x = 246,987.66
  5. Step 5: Solve for x
    x = 246,987.66/577.56
  6. Step 6: Final answer
    x = 427.64

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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.