Home / 2,075.28-2,863.86-1,289.76

Finding the Fourth Proportional to 2,075.28, 2,863.86 and 1,289.76

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Solution

The fourth proportional to 2,075.28, 2,863.86 and 1,289.76 is: 1,779.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.28 : 2,863.86 = 1,289.76 : x
  2. Step 2: Convert to fraction form
    2,075.28/2,863.86 = 1,289.76/x
  3. Step 3: Cross multiply
    2,075.28x = 2,863.86 × 1,289.76
  4. Step 4: Simplify right side
    2,075.28x = 3,693,692.07
  5. Step 5: Solve for x
    x = 3,693,692.07/2,075.28
  6. Step 6: Final answer
    x = 1,779.85

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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.