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Finding the Fourth Proportional to 354.10, 488.54 and 206.63

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Solution

The fourth proportional to 354.10, 488.54 and 206.63 is: 285.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.10 : 488.54 = 206.63 : x
  2. Step 2: Convert to fraction form
    354.10/488.54 = 206.63/x
  3. Step 3: Cross multiply
    354.10x = 488.54 × 206.63
  4. Step 4: Simplify right side
    354.10x = 100,945.84
  5. Step 5: Solve for x
    x = 100,945.84/354.10
  6. Step 6: Final answer
    x = 285.08

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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.