Home / 2,148.48-3,222.80-668.09

Finding the Fourth Proportional to 2,148.48, 3,222.80 and 668.09

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Solution

The fourth proportional to 2,148.48, 3,222.80 and 668.09 is: 1,002.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.48 : 3,222.80 = 668.09 : x
  2. Step 2: Convert to fraction form
    2,148.48/3,222.80 = 668.09/x
  3. Step 3: Cross multiply
    2,148.48x = 3,222.80 × 668.09
  4. Step 4: Simplify right side
    2,148.48x = 2,153,120.45
  5. Step 5: Solve for x
    x = 2,153,120.45/2,148.48
  6. Step 6: Final answer
    x = 1,002.16

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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.