Home / 2,115.06-3,172.90-654.33

Finding the Fourth Proportional to 2,115.06, 3,172.90 and 654.33

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Solution

The fourth proportional to 2,115.06, 3,172.90 and 654.33 is: 981.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.06 : 3,172.90 = 654.33 : x
  2. Step 2: Convert to fraction form
    2,115.06/3,172.90 = 654.33/x
  3. Step 3: Cross multiply
    2,115.06x = 3,172.90 × 654.33
  4. Step 4: Simplify right side
    2,115.06x = 2,076,115.46
  5. Step 5: Solve for x
    x = 2,076,115.46/2,115.06
  6. Step 6: Final answer
    x = 981.59

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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.