Home / 1,868.40-2,579.04-1,280.88

Finding the Fourth Proportional to 1,868.40, 2,579.04 and 1,280.88

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Solution

The fourth proportional to 1,868.40, 2,579.04 and 1,280.88 is: 1,768.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.40 : 2,579.04 = 1,280.88 : x
  2. Step 2: Convert to fraction form
    1,868.40/2,579.04 = 1,280.88/x
  3. Step 3: Cross multiply
    1,868.40x = 2,579.04 × 1,280.88
  4. Step 4: Simplify right side
    1,868.40x = 3,303,440.76
  5. Step 5: Solve for x
    x = 3,303,440.76/1,868.40
  6. Step 6: Final answer
    x = 1,768.06

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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.