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Finding the Fourth Proportional to 380.37, 524.15 and 275.12

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Solution

The fourth proportional to 380.37, 524.15 and 275.12 is: 379.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.37 : 524.15 = 275.12 : x
  2. Step 2: Convert to fraction form
    380.37/524.15 = 275.12/x
  3. Step 3: Cross multiply
    380.37x = 524.15 × 275.12
  4. Step 4: Simplify right side
    380.37x = 144,202.77
  5. Step 5: Solve for x
    x = 144,202.77/380.37
  6. Step 6: Final answer
    x = 379.11

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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.