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Finding the Fourth Proportional to 380.15, 569.78 and 174.68

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Solution

The fourth proportional to 380.15, 569.78 and 174.68 is: 261.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.15 : 569.78 = 174.68 : x
  2. Step 2: Convert to fraction form
    380.15/569.78 = 174.68/x
  3. Step 3: Cross multiply
    380.15x = 569.78 × 174.68
  4. Step 4: Simplify right side
    380.15x = 99,529.17
  5. Step 5: Solve for x
    x = 99,529.17/380.15
  6. Step 6: Final answer
    x = 261.82

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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.