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Finding the Fourth Proportional to 368.61, 552.74 and 214.59

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Solution

The fourth proportional to 368.61, 552.74 and 214.59 is: 321.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.61 : 552.74 = 214.59 : x
  2. Step 2: Convert to fraction form
    368.61/552.74 = 214.59/x
  3. Step 3: Cross multiply
    368.61x = 552.74 × 214.59
  4. Step 4: Simplify right side
    368.61x = 118,613.24
  5. Step 5: Solve for x
    x = 118,613.24/368.61
  6. Step 6: Final answer
    x = 321.78

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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.