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Finding the Fourth Proportional to 368.35, 551.72 and 214.12

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Solution

The fourth proportional to 368.35, 551.72 and 214.12 is: 320.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.35 : 551.72 = 214.12 : x
  2. Step 2: Convert to fraction form
    368.35/551.72 = 214.12/x
  3. Step 3: Cross multiply
    368.35x = 551.72 × 214.12
  4. Step 4: Simplify right side
    368.35x = 118,135.51
  5. Step 5: Solve for x
    x = 118,135.51/368.35
  6. Step 6: Final answer
    x = 320.72

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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.