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Finding the Fourth Proportional to 346.95, 478.79 and 189.58

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Solution

The fourth proportional to 346.95, 478.79 and 189.58 is: 261.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.95 : 478.79 = 189.58 : x
  2. Step 2: Convert to fraction form
    346.95/478.79 = 189.58/x
  3. Step 3: Cross multiply
    346.95x = 478.79 × 189.58
  4. Step 4: Simplify right side
    346.95x = 90,768.66
  5. Step 5: Solve for x
    x = 90,768.66/346.95
  6. Step 6: Final answer
    x = 261.62

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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.