Home / 2,688.98-3,712.66-1,980.93

Finding the Fourth Proportional to 2,688.98, 3,712.66 and 1,980.93

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Solution

The fourth proportional to 2,688.98, 3,712.66 and 1,980.93 is: 2,735.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.98 : 3,712.66 = 1,980.93 : x
  2. Step 2: Convert to fraction form
    2,688.98/3,712.66 = 1,980.93/x
  3. Step 3: Cross multiply
    2,688.98x = 3,712.66 × 1,980.93
  4. Step 4: Simplify right side
    2,688.98x = 7,354,514.62
  5. Step 5: Solve for x
    x = 7,354,514.62/2,688.98
  6. Step 6: Final answer
    x = 2,735.06

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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.