Home / 4,780.80-7,171.14-1,318.02

Finding the Fourth Proportional to 4,780.80, 7,171.14 and 1,318.02

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Solution

The fourth proportional to 4,780.80, 7,171.14 and 1,318.02 is: 1,977.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.80 : 7,171.14 = 1,318.02 : x
  2. Step 2: Convert to fraction form
    4,780.80/7,171.14 = 1,318.02/x
  3. Step 3: Cross multiply
    4,780.80x = 7,171.14 × 1,318.02
  4. Step 4: Simplify right side
    4,780.80x = 9,451,705.94
  5. Step 5: Solve for x
    x = 9,451,705.94/4,780.80
  6. Step 6: Final answer
    x = 1,977.01

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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.