Home / 3,072.78-4,609.76-1,685.36

Finding the Fourth Proportional to 3,072.78, 4,609.76 and 1,685.36

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Solution

The fourth proportional to 3,072.78, 4,609.76 and 1,685.36 is: 2,528.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.78 : 4,609.76 = 1,685.36 : x
  2. Step 2: Convert to fraction form
    3,072.78/4,609.76 = 1,685.36/x
  3. Step 3: Cross multiply
    3,072.78x = 4,609.76 × 1,685.36
  4. Step 4: Simplify right side
    3,072.78x = 7,769,108.21
  5. Step 5: Solve for x
    x = 7,769,108.21/3,072.78
  6. Step 6: Final answer
    x = 2,528.36

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1.5x scale

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.