Home / 2,816.49-3,887.67-1,977.40

Finding the Fourth Proportional to 2,816.49, 3,887.67 and 1,977.40

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Solution

The fourth proportional to 2,816.49, 3,887.67 and 1,977.40 is: 2,729.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.49 : 3,887.67 = 1,977.40 : x
  2. Step 2: Convert to fraction form
    2,816.49/3,887.67 = 1,977.40/x
  3. Step 3: Cross multiply
    2,816.49x = 3,887.67 × 1,977.40
  4. Step 4: Simplify right side
    2,816.49x = 7,687,476.35
  5. Step 5: Solve for x
    x = 7,687,476.35/2,816.49
  6. Step 6: Final answer
    x = 2,729.46

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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.