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Finding the Fourth Proportional to 701.12, 1,051.92 and 290.12

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Solution

The fourth proportional to 701.12, 1,051.92 and 290.12 is: 435.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.12 : 1,051.92 = 290.12 : x
  2. Step 2: Convert to fraction form
    701.12/1,051.92 = 290.12/x
  3. Step 3: Cross multiply
    701.12x = 1,051.92 × 290.12
  4. Step 4: Simplify right side
    701.12x = 305,183.03
  5. Step 5: Solve for x
    x = 305,183.03/701.12
  6. Step 6: Final answer
    x = 435.28

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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.