Home / 1,918.10-2,647.05-1,078.84

Finding the Fourth Proportional to 1,918.10, 2,647.05 and 1,078.84

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Solution

The fourth proportional to 1,918.10, 2,647.05 and 1,078.84 is: 1,488.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.10 : 2,647.05 = 1,078.84 : x
  2. Step 2: Convert to fraction form
    1,918.10/2,647.05 = 1,078.84/x
  3. Step 3: Cross multiply
    1,918.10x = 2,647.05 × 1,078.84
  4. Step 4: Simplify right side
    1,918.10x = 2,855,736.80
  5. Step 5: Solve for x
    x = 2,855,736.80/1,918.10
  6. Step 6: Final answer
    x = 1,488.84

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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.