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Finding the Fourth Proportional to 1,457.22, 2,185.74 and 727.32

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Solution

The fourth proportional to 1,457.22, 2,185.74 and 727.32 is: 1,090.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,457.22 : 2,185.74 = 727.32 : x
  2. Step 2: Convert to fraction form
    1,457.22/2,185.74 = 727.32/x
  3. Step 3: Cross multiply
    1,457.22x = 2,185.74 × 727.32
  4. Step 4: Simplify right side
    1,457.22x = 1,589,732.42
  5. Step 5: Solve for x
    x = 1,589,732.42/1,457.22
  6. Step 6: Final answer
    x = 1,090.94

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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.