Home / 4,780.50-7,171.14-1,317.78

Finding the Fourth Proportional to 4,780.50, 7,171.14 and 1,317.78

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Solution

The fourth proportional to 4,780.50, 7,171.14 and 1,317.78 is: 1,976.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780.50 : 7,171.14 = 1,317.78 : x
  2. Step 2: Convert to fraction form
    4,780.50/7,171.14 = 1,317.78/x
  3. Step 3: Cross multiply
    4,780.50x = 7,171.14 × 1,317.78
  4. Step 4: Simplify right side
    4,780.50x = 9,449,984.87
  5. Step 5: Solve for x
    x = 9,449,984.87/4,780.50
  6. Step 6: Final answer
    x = 1,976.78

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Double scale
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Similar ratio
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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.