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Finding the Fourth Proportional to 1,047.36, 1,576.08 and 945.12

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Solution

The fourth proportional to 1,047.36, 1,576.08 and 945.12 is: 1,422.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.36 : 1,576.08 = 945.12 : x
  2. Step 2: Convert to fraction form
    1,047.36/1,576.08 = 945.12/x
  3. Step 3: Cross multiply
    1,047.36x = 1,576.08 × 945.12
  4. Step 4: Simplify right side
    1,047.36x = 1,489,584.73
  5. Step 5: Solve for x
    x = 1,489,584.73/1,047.36
  6. Step 6: Final answer
    x = 1,422.23

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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.