Home / 1,768.77-2,440.40-1,139.33

Finding the Fourth Proportional to 1,768.77, 2,440.40 and 1,139.33

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Solution

The fourth proportional to 1,768.77, 2,440.40 and 1,139.33 is: 1,571.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,768.77 : 2,440.40 = 1,139.33 : x
  2. Step 2: Convert to fraction form
    1,768.77/2,440.40 = 1,139.33/x
  3. Step 3: Cross multiply
    1,768.77x = 2,440.40 × 1,139.33
  4. Step 4: Simplify right side
    1,768.77x = 2,780,421.34
  5. Step 5: Solve for x
    x = 2,780,421.34/1,768.77
  6. Step 6: Final answer
    x = 1,571.95

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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.