Home / 1,918.15-2,646.99-1,078.89

Finding the Fourth Proportional to 1,918.15, 2,646.99 and 1,078.89

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Solution

The fourth proportional to 1,918.15, 2,646.99 and 1,078.89 is: 1,488.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.15 : 2,646.99 = 1,078.89 : x
  2. Step 2: Convert to fraction form
    1,918.15/2,646.99 = 1,078.89/x
  3. Step 3: Cross multiply
    1,918.15x = 2,646.99 × 1,078.89
  4. Step 4: Simplify right side
    1,918.15x = 2,855,811.04
  5. Step 5: Solve for x
    x = 2,855,811.04/1,918.15
  6. Step 6: Final answer
    x = 1,488.84

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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.