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Finding the Fourth Proportional to 3,894.50, 5,842.71 and 1,158.50

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Solution

The fourth proportional to 3,894.50, 5,842.71 and 1,158.50 is: 1,738.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.50 : 5,842.71 = 1,158.50 : x
  2. Step 2: Convert to fraction form
    3,894.50/5,842.71 = 1,158.50/x
  3. Step 3: Cross multiply
    3,894.50x = 5,842.71 × 1,158.50
  4. Step 4: Simplify right side
    3,894.50x = 6,768,779.54
  5. Step 5: Solve for x
    x = 6,768,779.54/3,894.50
  6. Step 6: Final answer
    x = 1,738.04

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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.