Home / 3,130.96-4,692.72-1,280.92

Finding the Fourth Proportional to 3,130.96, 4,692.72 and 1,280.92

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Solution

The fourth proportional to 3,130.96, 4,692.72 and 1,280.92 is: 1,919.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.96 : 4,692.72 = 1,280.92 : x
  2. Step 2: Convert to fraction form
    3,130.96/4,692.72 = 1,280.92/x
  3. Step 3: Cross multiply
    3,130.96x = 4,692.72 × 1,280.92
  4. Step 4: Simplify right side
    3,130.96x = 6,010,998.90
  5. Step 5: Solve for x
    x = 6,010,998.90/3,130.96
  6. Step 6: Final answer
    x = 1,919.86

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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.