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Finding the Fourth Proportional to 1,297.42, 1,946.21 and 323.53

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Solution

The fourth proportional to 1,297.42, 1,946.21 and 323.53 is: 485.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.42 : 1,946.21 = 323.53 : x
  2. Step 2: Convert to fraction form
    1,297.42/1,946.21 = 323.53/x
  3. Step 3: Cross multiply
    1,297.42x = 1,946.21 × 323.53
  4. Step 4: Simplify right side
    1,297.42x = 629,657.32
  5. Step 5: Solve for x
    x = 629,657.32/1,297.42
  6. Step 6: Final answer
    x = 485.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.