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Finding the Fourth Proportional to 346.54, 478.06 and 222.16

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Solution

The fourth proportional to 346.54, 478.06 and 222.16 is: 306.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.54 : 478.06 = 222.16 : x
  2. Step 2: Convert to fraction form
    346.54/478.06 = 222.16/x
  3. Step 3: Cross multiply
    346.54x = 478.06 × 222.16
  4. Step 4: Simplify right side
    346.54x = 106,205.81
  5. Step 5: Solve for x
    x = 106,205.81/346.54
  6. Step 6: Final answer
    x = 306.47

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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.