Home / 2,315.79-3,195.80-1,267.85

Finding the Fourth Proportional to 2,315.79, 3,195.80 and 1,267.85

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Solution

The fourth proportional to 2,315.79, 3,195.80 and 1,267.85 is: 1,749.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,315.79 : 3,195.80 = 1,267.85 : x
  2. Step 2: Convert to fraction form
    2,315.79/3,195.80 = 1,267.85/x
  3. Step 3: Cross multiply
    2,315.79x = 3,195.80 × 1,267.85
  4. Step 4: Simplify right side
    2,315.79x = 4,051,806.19
  5. Step 5: Solve for x
    x = 4,051,806.19/2,315.79
  6. Step 6: Final answer
    x = 1,749.64

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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.