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Finding the Fourth Proportional to 346, 477.34 and 221.68

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Solution

The fourth proportional to 346, 477.34 and 221.68 is: 305.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    346 : 477.34 = 221.68 : x
  2. Step 2: Convert to fraction form
    346/477.34 = 221.68/x
  3. Step 3: Cross multiply
    346x = 477.34 × 221.68
  4. Step 4: Simplify right side
    346x = 105,816.73
  5. Step 5: Solve for x
    x = 105,816.73/346
  6. Step 6: Final answer
    x = 305.83

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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.