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Finding the Fourth Proportional to 4,881.60, 6,739.20 and 2,894.40

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Solution

The fourth proportional to 4,881.60, 6,739.20 and 2,894.40 is: 3,995.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,881.60 : 6,739.20 = 2,894.40 : x
  2. Step 2: Convert to fraction form
    4,881.60/6,739.20 = 2,894.40/x
  3. Step 3: Cross multiply
    4,881.60x = 6,739.20 × 2,894.40
  4. Step 4: Simplify right side
    4,881.60x = 19,505,940.48
  5. Step 5: Solve for x
    x = 19,505,940.48/4,881.60
  6. Step 6: Final answer
    x = 3,995.81

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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.