Home / 1,919.13-2,878.35-513.55

Finding the Fourth Proportional to 1,919.13, 2,878.35 and 513.55

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Solution

The fourth proportional to 1,919.13, 2,878.35 and 513.55 is: 770.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,919.13 : 2,878.35 = 513.55 : x
  2. Step 2: Convert to fraction form
    1,919.13/2,878.35 = 513.55/x
  3. Step 3: Cross multiply
    1,919.13x = 2,878.35 × 513.55
  4. Step 4: Simplify right side
    1,919.13x = 1,478,176.64
  5. Step 5: Solve for x
    x = 1,478,176.64/1,919.13
  6. Step 6: Final answer
    x = 770.23

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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.