Home / 2,915.11-4,019.79-1,919.11

Finding the Fourth Proportional to 2,915.11, 4,019.79 and 1,919.11

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Solution

The fourth proportional to 2,915.11, 4,019.79 and 1,919.11 is: 2,646.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,915.11 : 4,019.79 = 1,919.11 : x
  2. Step 2: Convert to fraction form
    2,915.11/4,019.79 = 1,919.11/x
  3. Step 3: Cross multiply
    2,915.11x = 4,019.79 × 1,919.11
  4. Step 4: Simplify right side
    2,915.11x = 7,714,423.87
  5. Step 5: Solve for x
    x = 7,714,423.87/2,915.11
  6. Step 6: Final answer
    x = 2,646.36

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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.