Home / 2,128.65-3,192.36-896.05

Finding the Fourth Proportional to 2,128.65, 3,192.36 and 896.05

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Solution

The fourth proportional to 2,128.65, 3,192.36 and 896.05 is: 1,343.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.65 : 3,192.36 = 896.05 : x
  2. Step 2: Convert to fraction form
    2,128.65/3,192.36 = 896.05/x
  3. Step 3: Cross multiply
    2,128.65x = 3,192.36 × 896.05
  4. Step 4: Simplify right side
    2,128.65x = 2,860,514.18
  5. Step 5: Solve for x
    x = 2,860,514.18/2,128.65
  6. Step 6: Final answer
    x = 1,343.82

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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.