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Finding the Fourth Proportional to 3,179.70, 4,770.37 and 988.45

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Solution

The fourth proportional to 3,179.70, 4,770.37 and 988.45 is: 1,482.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.70 : 4,770.37 = 988.45 : x
  2. Step 2: Convert to fraction form
    3,179.70/4,770.37 = 988.45/x
  3. Step 3: Cross multiply
    3,179.70x = 4,770.37 × 988.45
  4. Step 4: Simplify right side
    3,179.70x = 4,715,267.28
  5. Step 5: Solve for x
    x = 4,715,267.28/3,179.70
  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.