Home / 3,128.38-4,316.97-1,731.16

Finding the Fourth Proportional to 3,128.38, 4,316.97 and 1,731.16

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Solution

The fourth proportional to 3,128.38, 4,316.97 and 1,731.16 is: 2,388.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.38 : 4,316.97 = 1,731.16 : x
  2. Step 2: Convert to fraction form
    3,128.38/4,316.97 = 1,731.16/x
  3. Step 3: Cross multiply
    3,128.38x = 4,316.97 × 1,731.16
  4. Step 4: Simplify right side
    3,128.38x = 7,473,365.79
  5. Step 5: Solve for x
    x = 7,473,365.79/3,128.38
  6. Step 6: Final answer
    x = 2,388.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.