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Finding the Fourth Proportional to 346.16, 477.56 and 221.79

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Solution

The fourth proportional to 346.16, 477.56 and 221.79 is: 305.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.16 : 477.56 = 221.79 : x
  2. Step 2: Convert to fraction form
    346.16/477.56 = 221.79/x
  3. Step 3: Cross multiply
    346.16x = 477.56 × 221.79
  4. Step 4: Simplify right side
    346.16x = 105,918.03
  5. Step 5: Solve for x
    x = 105,918.03/346.16
  6. Step 6: Final answer
    x = 305.98

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.