Home / 2,106.85-3,160.65-719.86

Finding the Fourth Proportional to 2,106.85, 3,160.65 and 719.86

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Solution

The fourth proportional to 2,106.85, 3,160.65 and 719.86 is: 1,079.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,106.85 : 3,160.65 = 719.86 : x
  2. Step 2: Convert to fraction form
    2,106.85/3,160.65 = 719.86/x
  3. Step 3: Cross multiply
    2,106.85x = 3,160.65 × 719.86
  4. Step 4: Simplify right side
    2,106.85x = 2,275,225.51
  5. Step 5: Solve for x
    x = 2,275,225.51/2,106.85
  6. Step 6: Final answer
    x = 1,079.92

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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.