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Finding the Fourth Proportional to 442.93, 663.37 and 427.55

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Solution

The fourth proportional to 442.93, 663.37 and 427.55 is: 640.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.93 : 663.37 = 427.55 : x
  2. Step 2: Convert to fraction form
    442.93/663.37 = 427.55/x
  3. Step 3: Cross multiply
    442.93x = 663.37 × 427.55
  4. Step 4: Simplify right side
    442.93x = 283,621.71
  5. Step 5: Solve for x
    x = 283,621.71/442.93
  6. Step 6: Final answer
    x = 640.33

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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.