Home / 2,777.85-3,828.62-2,421.55

Finding the Fourth Proportional to 2,777.85, 3,828.62 and 2,421.55

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Solution

The fourth proportional to 2,777.85, 3,828.62 and 2,421.55 is: 3,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,777.85 : 3,828.62 = 2,421.55 : x
  2. Step 2: Convert to fraction form
    2,777.85/3,828.62 = 2,421.55/x
  3. Step 3: Cross multiply
    2,777.85x = 3,828.62 × 2,421.55
  4. Step 4: Simplify right side
    2,777.85x = 9,271,194.76
  5. Step 5: Solve for x
    x = 9,271,194.76/2,777.85
  6. Step 6: Final answer
    x = 3,337.54

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1.5x scale

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.