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Finding the Fourth Proportional to 3,894.22, 5,842.18 and 1,120.68

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Solution

The fourth proportional to 3,894.22, 5,842.18 and 1,120.68 is: 1,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.22 : 5,842.18 = 1,120.68 : x
  2. Step 2: Convert to fraction form
    3,894.22/5,842.18 = 1,120.68/x
  3. Step 3: Cross multiply
    3,894.22x = 5,842.18 × 1,120.68
  4. Step 4: Simplify right side
    3,894.22x = 6,547,214.28
  5. Step 5: Solve for x
    x = 6,547,214.28/3,894.22
  6. Step 6: Final answer
    x = 1,681.26

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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.