Home / 2,815.48-4,219.55-1,515.42

Finding the Fourth Proportional to 2,815.48, 4,219.55 and 1,515.42

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Solution

The fourth proportional to 2,815.48, 4,219.55 and 1,515.42 is: 2,271.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.48 : 4,219.55 = 1,515.42 : x
  2. Step 2: Convert to fraction form
    2,815.48/4,219.55 = 1,515.42/x
  3. Step 3: Cross multiply
    2,815.48x = 4,219.55 × 1,515.42
  4. Step 4: Simplify right side
    2,815.48x = 6,394,390.46
  5. Step 5: Solve for x
    x = 6,394,390.46/2,815.48
  6. Step 6: Final answer
    x = 2,271.15

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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.