Home / 4,780.78-7,170.36-1,318.03

Finding the Fourth Proportional to 4,780.78, 7,170.36 and 1,318.03

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Solution

The fourth proportional to 4,780.78, 7,170.36 and 1,318.03 is: 1,976.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.78 : 7,170.36 = 1,318.03 : x
  2. Step 2: Convert to fraction form
    4,780.78/7,170.36 = 1,318.03/x
  3. Step 3: Cross multiply
    4,780.78x = 7,170.36 × 1,318.03
  4. Step 4: Simplify right side
    4,780.78x = 9,450,749.59
  5. Step 5: Solve for x
    x = 9,450,749.59/4,780.78
  6. Step 6: Final answer
    x = 1,976.82

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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.