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Finding the Fourth Proportional to 384.37, 575.74 and 261.05

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Solution

The fourth proportional to 384.37, 575.74 and 261.05 is: 391.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.37 : 575.74 = 261.05 : x
  2. Step 2: Convert to fraction form
    384.37/575.74 = 261.05/x
  3. Step 3: Cross multiply
    384.37x = 575.74 × 261.05
  4. Step 4: Simplify right side
    384.37x = 150,296.93
  5. Step 5: Solve for x
    x = 150,296.93/384.37
  6. Step 6: Final answer
    x = 391.02

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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.