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Finding the Fourth Proportional to 368.62, 553.35 and 291.84

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Solution

The fourth proportional to 368.62, 553.35 and 291.84 is: 438.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.62 : 553.35 = 291.84 : x
  2. Step 2: Convert to fraction form
    368.62/553.35 = 291.84/x
  3. Step 3: Cross multiply
    368.62x = 553.35 × 291.84
  4. Step 4: Simplify right side
    368.62x = 161,489.66
  5. Step 5: Solve for x
    x = 161,489.66/368.62
  6. Step 6: Final answer
    x = 438.09

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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.