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Finding the Fourth Proportional to 3,080.90, 4,620 and 889.58

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Solution

The fourth proportional to 3,080.90, 4,620 and 889.58 is: 1,333.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,080.90 : 4,620 = 889.58 : x
  2. Step 2: Convert to fraction form
    3,080.90/4,620 = 889.58/x
  3. Step 3: Cross multiply
    3,080.90x = 4,620 × 889.58
  4. Step 4: Simplify right side
    3,080.90x = 4,109,859.60
  5. Step 5: Solve for x
    x = 4,109,859.60/3,080.90
  6. Step 6: Final answer
    x = 1,333.98

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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.