Home / 1,872.69-2,581.58-1,311.39

Finding the Fourth Proportional to 1,872.69, 2,581.58 and 1,311.39

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Solution

The fourth proportional to 1,872.69, 2,581.58 and 1,311.39 is: 1,807.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.69 : 2,581.58 = 1,311.39 : x
  2. Step 2: Convert to fraction form
    1,872.69/2,581.58 = 1,311.39/x
  3. Step 3: Cross multiply
    1,872.69x = 2,581.58 × 1,311.39
  4. Step 4: Simplify right side
    1,872.69x = 3,385,451.64
  5. Step 5: Solve for x
    x = 3,385,451.64/1,872.69
  6. Step 6: Final answer
    x = 1,807.80

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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.