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Finding the Fourth Proportional to 1,121.44, 1,682.22 and 471.52

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Solution

The fourth proportional to 1,121.44, 1,682.22 and 471.52 is: 707.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121.44 : 1,682.22 = 471.52 : x
  2. Step 2: Convert to fraction form
    1,121.44/1,682.22 = 471.52/x
  3. Step 3: Cross multiply
    1,121.44x = 1,682.22 × 471.52
  4. Step 4: Simplify right side
    1,121.44x = 793,200.37
  5. Step 5: Solve for x
    x = 793,200.37/1,121.44
  6. Step 6: Final answer
    x = 707.31

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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.