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Finding the Fourth Proportional to 368.97, 508.71 and 321.90

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Solution

The fourth proportional to 368.97, 508.71 and 321.90 is: 443.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.97 : 508.71 = 321.90 : x
  2. Step 2: Convert to fraction form
    368.97/508.71 = 321.90/x
  3. Step 3: Cross multiply
    368.97x = 508.71 × 321.90
  4. Step 4: Simplify right side
    368.97x = 163,753.75
  5. Step 5: Solve for x
    x = 163,753.75/368.97
  6. Step 6: Final answer
    x = 443.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.