Home / 2,740.90-3,781.09-1,955.40

Finding the Fourth Proportional to 2,740.90, 3,781.09 and 1,955.40

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Solution

The fourth proportional to 2,740.90, 3,781.09 and 1,955.40 is: 2,697.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,740.90 : 3,781.09 = 1,955.40 : x
  2. Step 2: Convert to fraction form
    2,740.90/3,781.09 = 1,955.40/x
  3. Step 3: Cross multiply
    2,740.90x = 3,781.09 × 1,955.40
  4. Step 4: Simplify right side
    2,740.90x = 7,393,543.39
  5. Step 5: Solve for x
    x = 7,393,543.39/2,740.90
  6. Step 6: Final answer
    x = 2,697.49

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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.