Home / 1,921.11-2,880.95-1,515.03

Finding the Fourth Proportional to 1,921.11, 2,880.95 and 1,515.03

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Solution

The fourth proportional to 1,921.11, 2,880.95 and 1,515.03 is: 2,271.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.11 : 2,880.95 = 1,515.03 : x
  2. Step 2: Convert to fraction form
    1,921.11/2,880.95 = 1,515.03/x
  3. Step 3: Cross multiply
    1,921.11x = 2,880.95 × 1,515.03
  4. Step 4: Simplify right side
    1,921.11x = 4,364,718.10
  5. Step 5: Solve for x
    x = 4,364,718.10/1,921.11
  6. Step 6: Final answer
    x = 2,271.98

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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.