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Finding the Fourth Proportional to 388.85, 536.60 and 214.18

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Solution

The fourth proportional to 388.85, 536.60 and 214.18 is: 295.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.85 : 536.60 = 214.18 : x
  2. Step 2: Convert to fraction form
    388.85/536.60 = 214.18/x
  3. Step 3: Cross multiply
    388.85x = 536.60 × 214.18
  4. Step 4: Simplify right side
    388.85x = 114,928.18
  5. Step 5: Solve for x
    x = 114,928.18/388.85
  6. Step 6: Final answer
    x = 295.56

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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.