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Finding the Fourth Proportional to 3,410.81, 4,706.74 and 1,918.79

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Solution

The fourth proportional to 3,410.81, 4,706.74 and 1,918.79 is: 2,647.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,410.81 : 4,706.74 = 1,918.79 : x
  2. Step 2: Convert to fraction form
    3,410.81/4,706.74 = 1,918.79/x
  3. Step 3: Cross multiply
    3,410.81x = 4,706.74 × 1,918.79
  4. Step 4: Simplify right side
    3,410.81x = 9,031,245.64
  5. Step 5: Solve for x
    x = 9,031,245.64/3,410.81
  6. Step 6: Final answer
    x = 2,647.83

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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.