Home / 1,815.15-2,722.73-1,325.55

Finding the Fourth Proportional to 1,815.15, 2,722.73 and 1,325.55

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Solution

The fourth proportional to 1,815.15, 2,722.73 and 1,325.55 is: 1,988.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.15 : 2,722.73 = 1,325.55 : x
  2. Step 2: Convert to fraction form
    1,815.15/2,722.73 = 1,325.55/x
  3. Step 3: Cross multiply
    1,815.15x = 2,722.73 × 1,325.55
  4. Step 4: Simplify right side
    1,815.15x = 3,609,108.12
  5. Step 5: Solve for x
    x = 3,609,108.12/1,815.15
  6. Step 6: Final answer
    x = 1,988.33

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1.5x scale

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.