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Finding the Fourth Proportional to 368.20, 554.74 and 338.68

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Solution

The fourth proportional to 368.20, 554.74 and 338.68 is: 510.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.20 : 554.74 = 338.68 : x
  2. Step 2: Convert to fraction form
    368.20/554.74 = 338.68/x
  3. Step 3: Cross multiply
    368.20x = 554.74 × 338.68
  4. Step 4: Simplify right side
    368.20x = 187,879.34
  5. Step 5: Solve for x
    x = 187,879.34/368.20
  6. Step 6: Final answer
    x = 510.26

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.