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Finding the Fourth Proportional to 1,076.51, 1,485.36 and 704.04

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Solution

The fourth proportional to 1,076.51, 1,485.36 and 704.04 is: 971.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,076.51 : 1,485.36 = 704.04 : x
  2. Step 2: Convert to fraction form
    1,076.51/1,485.36 = 704.04/x
  3. Step 3: Cross multiply
    1,076.51x = 1,485.36 × 704.04
  4. Step 4: Simplify right side
    1,076.51x = 1,045,752.85
  5. Step 5: Solve for x
    x = 1,045,752.85/1,076.51
  6. Step 6: Final answer
    x = 971.43

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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.