Home / 2,783.16-4,172.70-1,320.60

Finding the Fourth Proportional to 2,783.16, 4,172.70 and 1,320.60

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Solution

The fourth proportional to 2,783.16, 4,172.70 and 1,320.60 is: 1,979.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.16 : 4,172.70 = 1,320.60 : x
  2. Step 2: Convert to fraction form
    2,783.16/4,172.70 = 1,320.60/x
  3. Step 3: Cross multiply
    2,783.16x = 4,172.70 × 1,320.60
  4. Step 4: Simplify right side
    2,783.16x = 5,510,467.62
  5. Step 5: Solve for x
    x = 5,510,467.62/2,783.16
  6. Step 6: Final answer
    x = 1,979.93

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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.