Home / 1,872.20-2,583.61-1,021.45

Finding the Fourth Proportional to 1,872.20, 2,583.61 and 1,021.45

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Solution

The fourth proportional to 1,872.20, 2,583.61 and 1,021.45 is: 1,409.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,872.20 : 2,583.61 = 1,021.45 : x
  2. Step 2: Convert to fraction form
    1,872.20/2,583.61 = 1,021.45/x
  3. Step 3: Cross multiply
    1,872.20x = 2,583.61 × 1,021.45
  4. Step 4: Simplify right side
    1,872.20x = 2,639,023.25
  5. Step 5: Solve for x
    x = 2,639,023.25/1,872.20
  6. Step 6: Final answer
    x = 1,409.58

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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.