Home / 1,619.20-2,232.32-1,288.72

Finding the Fourth Proportional to 1,619.20, 2,232.32 and 1,288.72

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Solution

The fourth proportional to 1,619.20, 2,232.32 and 1,288.72 is: 1,776.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.20 : 2,232.32 = 1,288.72 : x
  2. Step 2: Convert to fraction form
    1,619.20/2,232.32 = 1,288.72/x
  3. Step 3: Cross multiply
    1,619.20x = 2,232.32 × 1,288.72
  4. Step 4: Simplify right side
    1,619.20x = 2,876,835.43
  5. Step 5: Solve for x
    x = 2,876,835.43/1,619.20
  6. Step 6: Final answer
    x = 1,776.70

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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.