Home / 1,861.72-2,789.44-1,312.92

Finding the Fourth Proportional to 1,861.72, 2,789.44 and 1,312.92

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Solution

The fourth proportional to 1,861.72, 2,789.44 and 1,312.92 is: 1,967.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.72 : 2,789.44 = 1,312.92 : x
  2. Step 2: Convert to fraction form
    1,861.72/2,789.44 = 1,312.92/x
  3. Step 3: Cross multiply
    1,861.72x = 2,789.44 × 1,312.92
  4. Step 4: Simplify right side
    1,861.72x = 3,662,311.56
  5. Step 5: Solve for x
    x = 3,662,311.56/1,861.72
  6. Step 6: Final answer
    x = 1,967.17

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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.