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Finding the Fourth Proportional to 4,755.78, 7,130.96 and 3,980.61

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Solution

The fourth proportional to 4,755.78, 7,130.96 and 3,980.61 is: 5,968.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,755.78 : 7,130.96 = 3,980.61 : x
  2. Step 2: Convert to fraction form
    4,755.78/7,130.96 = 3,980.61/x
  3. Step 3: Cross multiply
    4,755.78x = 7,130.96 × 3,980.61
  4. Step 4: Simplify right side
    4,755.78x = 28,385,550.78
  5. Step 5: Solve for x
    x = 28,385,550.78/4,755.78
  6. Step 6: Final answer
    x = 5,968.64

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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.