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Finding the Fourth Proportional to 354.06, 485.38 and 348.39

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Solution

The fourth proportional to 354.06, 485.38 and 348.39 is: 477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.06 : 485.38 = 348.39 : x
  2. Step 2: Convert to fraction form
    354.06/485.38 = 348.39/x
  3. Step 3: Cross multiply
    354.06x = 485.38 × 348.39
  4. Step 4: Simplify right side
    354.06x = 169,100.67
  5. Step 5: Solve for x
    x = 169,100.67/354.06
  6. Step 6: Final answer
    x = 477.60

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.