Home / 2,075.66-2,865.45-1,289.96

Finding the Fourth Proportional to 2,075.66, 2,865.45 and 1,289.96

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Solution

The fourth proportional to 2,075.66, 2,865.45 and 1,289.96 is: 1,780.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.66 : 2,865.45 = 1,289.96 : x
  2. Step 2: Convert to fraction form
    2,075.66/2,865.45 = 1,289.96/x
  3. Step 3: Cross multiply
    2,075.66x = 2,865.45 × 1,289.96
  4. Step 4: Simplify right side
    2,075.66x = 3,696,315.88
  5. Step 5: Solve for x
    x = 3,696,315.88/2,075.66
  6. Step 6: Final answer
    x = 1,780.79

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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.