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Finding the Fourth Proportional to 346.75, 478.46 and 206.82

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Solution

The fourth proportional to 346.75, 478.46 and 206.82 is: 285.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.75 : 478.46 = 206.82 : x
  2. Step 2: Convert to fraction form
    346.75/478.46 = 206.82/x
  3. Step 3: Cross multiply
    346.75x = 478.46 × 206.82
  4. Step 4: Simplify right side
    346.75x = 98,955.61
  5. Step 5: Solve for x
    x = 98,955.61/346.75
  6. Step 6: Final answer
    x = 285.38

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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.