Home / 1,919.08-2,878.68-749.35

Finding the Fourth Proportional to 1,919.08, 2,878.68 and 749.35

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Solution

The fourth proportional to 1,919.08, 2,878.68 and 749.35 is: 1,124.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.08 : 2,878.68 = 749.35 : x
  2. Step 2: Convert to fraction form
    1,919.08/2,878.68 = 749.35/x
  3. Step 3: Cross multiply
    1,919.08x = 2,878.68 × 749.35
  4. Step 4: Simplify right side
    1,919.08x = 2,157,138.86
  5. Step 5: Solve for x
    x = 2,157,138.86/1,919.08
  6. Step 6: Final answer
    x = 1,124.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.