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Finding the Fourth Proportional to 3,478.61, 4,800.82 and 1,986.64

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Solution

The fourth proportional to 3,478.61, 4,800.82 and 1,986.64 is: 2,741.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,478.61 : 4,800.82 = 1,986.64 : x
  2. Step 2: Convert to fraction form
    3,478.61/4,800.82 = 1,986.64/x
  3. Step 3: Cross multiply
    3,478.61x = 4,800.82 × 1,986.64
  4. Step 4: Simplify right side
    3,478.61x = 9,537,514.81
  5. Step 5: Solve for x
    x = 9,537,514.81/3,478.61
  6. Step 6: Final answer
    x = 2,741.76

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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.