Home / 2,740.05-4,089.06-2,120.40

Finding the Fourth Proportional to 2,740.05, 4,089.06 and 2,120.40

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Solution

The fourth proportional to 2,740.05, 4,089.06 and 2,120.40 is: 3,164.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.05 : 4,089.06 = 2,120.40 : x
  2. Step 2: Convert to fraction form
    2,740.05/4,089.06 = 2,120.40/x
  3. Step 3: Cross multiply
    2,740.05x = 4,089.06 × 2,120.40
  4. Step 4: Simplify right side
    2,740.05x = 8,670,442.82
  5. Step 5: Solve for x
    x = 8,670,442.82/2,740.05
  6. Step 6: Final answer
    x = 3,164.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.