Home / 2,115.16-3,172.70-555.04

Finding the Fourth Proportional to 2,115.16, 3,172.70 and 555.04

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Solution

The fourth proportional to 2,115.16, 3,172.70 and 555.04 is: 832.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.16 : 3,172.70 = 555.04 : x
  2. Step 2: Convert to fraction form
    2,115.16/3,172.70 = 555.04/x
  3. Step 3: Cross multiply
    2,115.16x = 3,172.70 × 555.04
  4. Step 4: Simplify right side
    2,115.16x = 1,760,975.41
  5. Step 5: Solve for x
    x = 1,760,975.41/2,115.16
  6. Step 6: Final answer
    x = 832.55

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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.