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Finding the Fourth Proportional to 368.21, 550.16 and 355.46

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Solution

The fourth proportional to 368.21, 550.16 and 355.46 is: 531.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.21 : 550.16 = 355.46 : x
  2. Step 2: Convert to fraction form
    368.21/550.16 = 355.46/x
  3. Step 3: Cross multiply
    368.21x = 550.16 × 355.46
  4. Step 4: Simplify right side
    368.21x = 195,555.35
  5. Step 5: Solve for x
    x = 195,555.35/368.21
  6. Step 6: Final answer
    x = 531.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.