Home / 3,120.88-4,307.64-1,941.28

Finding the Fourth Proportional to 3,120.88, 4,307.64 and 1,941.28

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Solution

The fourth proportional to 3,120.88, 4,307.64 and 1,941.28 is: 2,679.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.88 : 4,307.64 = 1,941.28 : x
  2. Step 2: Convert to fraction form
    3,120.88/4,307.64 = 1,941.28/x
  3. Step 3: Cross multiply
    3,120.88x = 4,307.64 × 1,941.28
  4. Step 4: Simplify right side
    3,120.88x = 8,362,335.38
  5. Step 5: Solve for x
    x = 8,362,335.38/3,120.88
  6. Step 6: Final answer
    x = 2,679.48

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Double scale
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1.5x scale

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.