Home / 1,821.60-2,512.08-1,679.40

Finding the Fourth Proportional to 1,821.60, 2,512.08 and 1,679.40

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Solution

The fourth proportional to 1,821.60, 2,512.08 and 1,679.40 is: 2,315.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,821.60 : 2,512.08 = 1,679.40 : x
  2. Step 2: Convert to fraction form
    1,821.60/2,512.08 = 1,679.40/x
  3. Step 3: Cross multiply
    1,821.60x = 2,512.08 × 1,679.40
  4. Step 4: Simplify right side
    1,821.60x = 4,218,787.15
  5. Step 5: Solve for x
    x = 4,218,787.15/1,821.60
  6. Step 6: Final answer
    x = 2,315.98

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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.