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Finding the Fourth Proportional to 5,260.80, 7,894.80 and 2,920.80

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Solution

The fourth proportional to 5,260.80, 7,894.80 and 2,920.80 is: 4,383.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,260.80 : 7,894.80 = 2,920.80 : x
  2. Step 2: Convert to fraction form
    5,260.80/7,894.80 = 2,920.80/x
  3. Step 3: Cross multiply
    5,260.80x = 7,894.80 × 2,920.80
  4. Step 4: Simplify right side
    5,260.80x = 23,059,131.84
  5. Step 5: Solve for x
    x = 23,059,131.84/5,260.80
  6. Step 6: Final answer
    x = 4,383.20

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1.5x scale

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.