Home / 2,811.60-3,872.46-2,438.58

Finding the Fourth Proportional to 2,811.60, 3,872.46 and 2,438.58

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Solution

The fourth proportional to 2,811.60, 3,872.46 and 2,438.58 is: 3,358.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.60 : 3,872.46 = 2,438.58 : x
  2. Step 2: Convert to fraction form
    2,811.60/3,872.46 = 2,438.58/x
  3. Step 3: Cross multiply
    2,811.60x = 3,872.46 × 2,438.58
  4. Step 4: Simplify right side
    2,811.60x = 9,443,303.51
  5. Step 5: Solve for x
    x = 9,443,303.51/2,811.60
  6. Step 6: Final answer
    x = 3,358.69

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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.