Home / 1,918.58-2,646.95-1,422.05

Finding the Fourth Proportional to 1,918.58, 2,646.95 and 1,422.05

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Solution

The fourth proportional to 1,918.58, 2,646.95 and 1,422.05 is: 1,961.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.58 : 2,646.95 = 1,422.05 : x
  2. Step 2: Convert to fraction form
    1,918.58/2,646.95 = 1,422.05/x
  3. Step 3: Cross multiply
    1,918.58x = 2,646.95 × 1,422.05
  4. Step 4: Simplify right side
    1,918.58x = 3,764,074.90
  5. Step 5: Solve for x
    x = 3,764,074.90/1,918.58
  6. Step 6: Final answer
    x = 1,961.91

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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.