Home / 2,615.72-3,923.60-668.07

Finding the Fourth Proportional to 2,615.72, 3,923.60 and 668.07

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Solution

The fourth proportional to 2,615.72, 3,923.60 and 668.07 is: 1,002.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.72 : 3,923.60 = 668.07 : x
  2. Step 2: Convert to fraction form
    2,615.72/3,923.60 = 668.07/x
  3. Step 3: Cross multiply
    2,615.72x = 3,923.60 × 668.07
  4. Step 4: Simplify right side
    2,615.72x = 2,621,236.11
  5. Step 5: Solve for x
    x = 2,621,236.11/2,615.72
  6. Step 6: Final answer
    x = 1,002.11

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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.