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Finding the Fourth Proportional to 3,179.58, 4,770.05 and 988.48

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Solution

The fourth proportional to 3,179.58, 4,770.05 and 988.48 is: 1,482.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.58 : 4,770.05 = 988.48 : x
  2. Step 2: Convert to fraction form
    3,179.58/4,770.05 = 988.48/x
  3. Step 3: Cross multiply
    3,179.58x = 4,770.05 × 988.48
  4. Step 4: Simplify right side
    3,179.58x = 4,715,093.58
  5. Step 5: Solve for x
    x = 4,715,093.58/3,179.58
  6. Step 6: Final answer
    x = 1,482.93

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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.