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Finding the Fourth Proportional to 3,200, 4,416.48 and 1,958.72

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Solution

The fourth proportional to 3,200, 4,416.48 and 1,958.72 is: 2,703.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,200 : 4,416.48 = 1,958.72 : x
  2. Step 2: Convert to fraction form
    3,200/4,416.48 = 1,958.72/x
  3. Step 3: Cross multiply
    3,200x = 4,416.48 × 1,958.72
  4. Step 4: Simplify right side
    3,200x = 8,650,647.71
  5. Step 5: Solve for x
    x = 8,650,647.71/3,200
  6. Step 6: Final answer
    x = 2,703.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.