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Finding the Fourth Proportional to 345.35, 476.69 and 221.34

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Solution

The fourth proportional to 345.35, 476.69 and 221.34 is: 305.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.35 : 476.69 = 221.34 : x
  2. Step 2: Convert to fraction form
    345.35/476.69 = 221.34/x
  3. Step 3: Cross multiply
    345.35x = 476.69 × 221.34
  4. Step 4: Simplify right side
    345.35x = 105,510.56
  5. Step 5: Solve for x
    x = 105,510.56/345.35
  6. Step 6: Final answer
    x = 305.52

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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.