Home / 3,180.12-4,770.78-988.84

Finding the Fourth Proportional to 3,180.12, 4,770.78 and 988.84

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Solution

The fourth proportional to 3,180.12, 4,770.78 and 988.84 is: 1,483.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,180.12 : 4,770.78 = 988.84 : x
  2. Step 2: Convert to fraction form
    3,180.12/4,770.78 = 988.84/x
  3. Step 3: Cross multiply
    3,180.12x = 4,770.78 × 988.84
  4. Step 4: Simplify right side
    3,180.12x = 4,717,538.10
  5. Step 5: Solve for x
    x = 4,717,538.10/3,180.12
  6. Step 6: Final answer
    x = 1,483.45

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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.