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Finding the Fourth Proportional to 442.79, 610.62 and 285.26

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Solution

The fourth proportional to 442.79, 610.62 and 285.26 is: 393.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.79 : 610.62 = 285.26 : x
  2. Step 2: Convert to fraction form
    442.79/610.62 = 285.26/x
  3. Step 3: Cross multiply
    442.79x = 610.62 × 285.26
  4. Step 4: Simplify right side
    442.79x = 174,185.46
  5. Step 5: Solve for x
    x = 174,185.46/442.79
  6. Step 6: Final answer
    x = 393.38

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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.