Home / 1,820.10-2,730.15-1,200.45

Finding the Fourth Proportional to 1,820.10, 2,730.15 and 1,200.45

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Solution

The fourth proportional to 1,820.10, 2,730.15 and 1,200.45 is: 1,800.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,820.10 : 2,730.15 = 1,200.45 : x
  2. Step 2: Convert to fraction form
    1,820.10/2,730.15 = 1,200.45/x
  3. Step 3: Cross multiply
    1,820.10x = 2,730.15 × 1,200.45
  4. Step 4: Simplify right side
    1,820.10x = 3,277,408.57
  5. Step 5: Solve for x
    x = 3,277,408.57/1,820.10
  6. Step 6: Final answer
    x = 1,800.68

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.