Home / 3,128.14-4,316.82-1,730.90

Finding the Fourth Proportional to 3,128.14, 4,316.82 and 1,730.90

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Solution

The fourth proportional to 3,128.14, 4,316.82 and 1,730.90 is: 2,388.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.14 : 4,316.82 = 1,730.90 : x
  2. Step 2: Convert to fraction form
    3,128.14/4,316.82 = 1,730.90/x
  3. Step 3: Cross multiply
    3,128.14x = 4,316.82 × 1,730.90
  4. Step 4: Simplify right side
    3,128.14x = 7,471,983.74
  5. Step 5: Solve for x
    x = 7,471,983.74/3,128.14
  6. Step 6: Final answer
    x = 2,388.63

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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.