Home / 1,981.90-2,734.86-1,771.40

Finding the Fourth Proportional to 1,981.90, 2,734.86 and 1,771.40

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Solution

The fourth proportional to 1,981.90, 2,734.86 and 1,771.40 is: 2,444.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.90 : 2,734.86 = 1,771.40 : x
  2. Step 2: Convert to fraction form
    1,981.90/2,734.86 = 1,771.40/x
  3. Step 3: Cross multiply
    1,981.90x = 2,734.86 × 1,771.40
  4. Step 4: Simplify right side
    1,981.90x = 4,844,544.48
  5. Step 5: Solve for x
    x = 4,844,544.48/1,981.90
  6. Step 6: Final answer
    x = 2,444.39

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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.