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Finding the Fourth Proportional to 384.50, 574.97 and 285.86

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Solution

The fourth proportional to 384.50, 574.97 and 285.86 is: 427.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.50 : 574.97 = 285.86 : x
  2. Step 2: Convert to fraction form
    384.50/574.97 = 285.86/x
  3. Step 3: Cross multiply
    384.50x = 574.97 × 285.86
  4. Step 4: Simplify right side
    384.50x = 164,356.62
  5. Step 5: Solve for x
    x = 164,356.62/384.50
  6. Step 6: Final answer
    x = 427.46

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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.