Home / 2,128.24-3,192.56-667.36

Finding the Fourth Proportional to 2,128.24, 3,192.56 and 667.36

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Solution

The fourth proportional to 2,128.24, 3,192.56 and 667.36 is: 1,001.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.24 : 3,192.56 = 667.36 : x
  2. Step 2: Convert to fraction form
    2,128.24/3,192.56 = 667.36/x
  3. Step 3: Cross multiply
    2,128.24x = 3,192.56 × 667.36
  4. Step 4: Simplify right side
    2,128.24x = 2,130,586.84
  5. Step 5: Solve for x
    x = 2,130,586.84/2,128.24
  6. Step 6: Final answer
    x = 1,001.10

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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.