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Finding the Fourth Proportional to 368.70, 508.83 and 221.35

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Solution

The fourth proportional to 368.70, 508.83 and 221.35 is: 305.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.70 : 508.83 = 221.35 : x
  2. Step 2: Convert to fraction form
    368.70/508.83 = 221.35/x
  3. Step 3: Cross multiply
    368.70x = 508.83 × 221.35
  4. Step 4: Simplify right side
    368.70x = 112,629.52
  5. Step 5: Solve for x
    x = 112,629.52/368.70
  6. Step 6: Final answer
    x = 305.48

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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.