Home / 3,119.08-4,681.34-1,271.20

Finding the Fourth Proportional to 3,119.08, 4,681.34 and 1,271.20

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Solution

The fourth proportional to 3,119.08, 4,681.34 and 1,271.20 is: 1,907.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.08 : 4,681.34 = 1,271.20 : x
  2. Step 2: Convert to fraction form
    3,119.08/4,681.34 = 1,271.20/x
  3. Step 3: Cross multiply
    3,119.08x = 4,681.34 × 1,271.20
  4. Step 4: Simplify right side
    3,119.08x = 5,950,919.41
  5. Step 5: Solve for x
    x = 5,950,919.41/3,119.08
  6. Step 6: Final answer
    x = 1,907.91

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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.