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Finding the Fourth Proportional to 354.12, 488.60 and 238.02

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Solution

The fourth proportional to 354.12, 488.60 and 238.02 is: 328.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.12 : 488.60 = 238.02 : x
  2. Step 2: Convert to fraction form
    354.12/488.60 = 238.02/x
  3. Step 3: Cross multiply
    354.12x = 488.60 × 238.02
  4. Step 4: Simplify right side
    354.12x = 116,296.57
  5. Step 5: Solve for x
    x = 116,296.57/354.12
  6. Step 6: Final answer
    x = 328.41

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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.