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Finding the Fourth Proportional to 345.96, 478.44 and 343.80

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Solution

The fourth proportional to 345.96, 478.44 and 343.80 is: 475.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.96 : 478.44 = 343.80 : x
  2. Step 2: Convert to fraction form
    345.96/478.44 = 343.80/x
  3. Step 3: Cross multiply
    345.96x = 478.44 × 343.80
  4. Step 4: Simplify right side
    345.96x = 164,487.67
  5. Step 5: Solve for x
    x = 164,487.67/345.96
  6. Step 6: Final answer
    x = 475.45

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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.