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Finding the Fourth Proportional to 442.94, 611.51 and 285.57

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Solution

The fourth proportional to 442.94, 611.51 and 285.57 is: 394.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.94 : 611.51 = 285.57 : x
  2. Step 2: Convert to fraction form
    442.94/611.51 = 285.57/x
  3. Step 3: Cross multiply
    442.94x = 611.51 × 285.57
  4. Step 4: Simplify right side
    442.94x = 174,627.48
  5. Step 5: Solve for x
    x = 174,627.48/442.94
  6. Step 6: Final answer
    x = 394.25

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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.