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Finding the Fourth Proportional to 1,297.28, 1,946.45 and 475.63

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Solution

The fourth proportional to 1,297.28, 1,946.45 and 475.63 is: 713.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.28 : 1,946.45 = 475.63 : x
  2. Step 2: Convert to fraction form
    1,297.28/1,946.45 = 475.63/x
  3. Step 3: Cross multiply
    1,297.28x = 1,946.45 × 475.63
  4. Step 4: Simplify right side
    1,297.28x = 925,790.01
  5. Step 5: Solve for x
    x = 925,790.01/1,297.28
  6. Step 6: Final answer
    x = 713.64

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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.