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Finding the Fourth Proportional to 346.45, 478.03 and 220.30

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Solution

The fourth proportional to 346.45, 478.03 and 220.30 is: 303.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.45 : 478.03 = 220.30 : x
  2. Step 2: Convert to fraction form
    346.45/478.03 = 220.30/x
  3. Step 3: Cross multiply
    346.45x = 478.03 × 220.30
  4. Step 4: Simplify right side
    346.45x = 105,310.01
  5. Step 5: Solve for x
    x = 105,310.01/346.45
  6. Step 6: Final answer
    x = 303.97

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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.