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Finding the Fourth Proportional to 340.12, 468.84 and 221.89

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Solution

The fourth proportional to 340.12, 468.84 and 221.89 is: 305.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.12 : 468.84 = 221.89 : x
  2. Step 2: Convert to fraction form
    340.12/468.84 = 221.89/x
  3. Step 3: Cross multiply
    340.12x = 468.84 × 221.89
  4. Step 4: Simplify right side
    340.12x = 104,030.20
  5. Step 5: Solve for x
    x = 104,030.20/340.12
  6. Step 6: Final answer
    x = 305.86

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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.