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Finding the Fourth Proportional to 943.56, 1,299.79 and 803.23

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Solution

The fourth proportional to 943.56, 1,299.79 and 803.23 is: 1,106.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    943.56 : 1,299.79 = 803.23 : x
  2. Step 2: Convert to fraction form
    943.56/1,299.79 = 803.23/x
  3. Step 3: Cross multiply
    943.56x = 1,299.79 × 803.23
  4. Step 4: Simplify right side
    943.56x = 1,044,025.06
  5. Step 5: Solve for x
    x = 1,044,025.06/943.56
  6. Step 6: Final answer
    x = 1,106.47

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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.