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Finding the Fourth Proportional to 368, 551.84 and 213.76

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Solution

The fourth proportional to 368, 551.84 and 213.76 is: 320.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    368 : 551.84 = 213.76 : x
  2. Step 2: Convert to fraction form
    368/551.84 = 213.76/x
  3. Step 3: Cross multiply
    368x = 551.84 × 213.76
  4. Step 4: Simplify right side
    368x = 117,961.32
  5. Step 5: Solve for x
    x = 117,961.32/368
  6. Step 6: Final answer
    x = 320.55

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.