Home / 2,792.60-4,189.50-1,312.70

Finding the Fourth Proportional to 2,792.60, 4,189.50 and 1,312.70

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Solution

The fourth proportional to 2,792.60, 4,189.50 and 1,312.70 is: 1,969.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.60 : 4,189.50 = 1,312.70 : x
  2. Step 2: Convert to fraction form
    2,792.60/4,189.50 = 1,312.70/x
  3. Step 3: Cross multiply
    2,792.60x = 4,189.50 × 1,312.70
  4. Step 4: Simplify right side
    2,792.60x = 5,499,556.65
  5. Step 5: Solve for x
    x = 5,499,556.65/2,792.60
  6. Step 6: Final answer
    x = 1,969.33

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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.