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Finding the Fourth Proportional to 3,479.42, 4,800.64 and 1,986.80

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Solution

The fourth proportional to 3,479.42, 4,800.64 and 1,986.80 is: 2,741.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,479.42 : 4,800.64 = 1,986.80 : x
  2. Step 2: Convert to fraction form
    3,479.42/4,800.64 = 1,986.80/x
  3. Step 3: Cross multiply
    3,479.42x = 4,800.64 × 1,986.80
  4. Step 4: Simplify right side
    3,479.42x = 9,537,911.55
  5. Step 5: Solve for x
    x = 9,537,911.55/3,479.42
  6. Step 6: Final answer
    x = 2,741.24

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1.5x scale

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.