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Finding the Fourth Proportional to 345.96, 477.90 and 343.53

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Solution

The fourth proportional to 345.96, 477.90 and 343.53 is: 474.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    345.96 : 477.90 = 343.53 : x
  2. Step 2: Convert to fraction form
    345.96/477.90 = 343.53/x
  3. Step 3: Cross multiply
    345.96x = 477.90 × 343.53
  4. Step 4: Simplify right side
    345.96x = 164,172.99
  5. Step 5: Solve for x
    x = 164,172.99/345.96
  6. Step 6: Final answer
    x = 474.54

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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.