Home / 1,768.32-2,439.21-1,138.62

Finding the Fourth Proportional to 1,768.32, 2,439.21 and 1,138.62

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Solution

The fourth proportional to 1,768.32, 2,439.21 and 1,138.62 is: 1,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.32 : 2,439.21 = 1,138.62 : x
  2. Step 2: Convert to fraction form
    1,768.32/2,439.21 = 1,138.62/x
  3. Step 3: Cross multiply
    1,768.32x = 2,439.21 × 1,138.62
  4. Step 4: Simplify right side
    1,768.32x = 2,777,333.29
  5. Step 5: Solve for x
    x = 2,777,333.29/1,768.32
  6. Step 6: Final answer
    x = 1,570.61

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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.