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Finding the Fourth Proportional to 381.05, 573.64 and 260.07

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Solution

The fourth proportional to 381.05, 573.64 and 260.07 is: 391.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.05 : 573.64 = 260.07 : x
  2. Step 2: Convert to fraction form
    381.05/573.64 = 260.07/x
  3. Step 3: Cross multiply
    381.05x = 573.64 × 260.07
  4. Step 4: Simplify right side
    381.05x = 149,186.55
  5. Step 5: Solve for x
    x = 149,186.55/381.05
  6. Step 6: Final answer
    x = 391.52

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.