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Finding the Fourth Proportional to 346.37, 478.06 and 198.99

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Solution

The fourth proportional to 346.37, 478.06 and 198.99 is: 274.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.37 : 478.06 = 198.99 : x
  2. Step 2: Convert to fraction form
    346.37/478.06 = 198.99/x
  3. Step 3: Cross multiply
    346.37x = 478.06 × 198.99
  4. Step 4: Simplify right side
    346.37x = 95,128.66
  5. Step 5: Solve for x
    x = 95,128.66/346.37
  6. Step 6: Final answer
    x = 274.65

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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.