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Finding the Fourth Proportional to 3,179.82, 4,770.66 and 988.74

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Solution

The fourth proportional to 3,179.82, 4,770.66 and 988.74 is: 1,483.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.82 : 4,770.66 = 988.74 : x
  2. Step 2: Convert to fraction form
    3,179.82/4,770.66 = 988.74/x
  3. Step 3: Cross multiply
    3,179.82x = 4,770.66 × 988.74
  4. Step 4: Simplify right side
    3,179.82x = 4,716,942.37
  5. Step 5: Solve for x
    x = 4,716,942.37/3,179.82
  6. Step 6: Final answer
    x = 1,483.40

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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.