Home / 1,977.12-2,727.36-1,387.36

Finding the Fourth Proportional to 1,977.12, 2,727.36 and 1,387.36

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Solution

The fourth proportional to 1,977.12, 2,727.36 and 1,387.36 is: 1,913.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.12 : 2,727.36 = 1,387.36 : x
  2. Step 2: Convert to fraction form
    1,977.12/2,727.36 = 1,387.36/x
  3. Step 3: Cross multiply
    1,977.12x = 2,727.36 × 1,387.36
  4. Step 4: Simplify right side
    1,977.12x = 3,783,830.17
  5. Step 5: Solve for x
    x = 3,783,830.17/1,977.12
  6. Step 6: Final answer
    x = 1,913.81

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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.