Home / 3,935.25-5,430.65-2,279.25

Finding the Fourth Proportional to 3,935.25, 5,430.65 and 2,279.25

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Solution

The fourth proportional to 3,935.25, 5,430.65 and 2,279.25 is: 3,145.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.25 : 5,430.65 = 2,279.25 : x
  2. Step 2: Convert to fraction form
    3,935.25/5,430.65 = 2,279.25/x
  3. Step 3: Cross multiply
    3,935.25x = 5,430.65 × 2,279.25
  4. Step 4: Simplify right side
    3,935.25x = 12,377,797.62
  5. Step 5: Solve for x
    x = 12,377,797.62/3,935.25
  6. Step 6: Final answer
    x = 3,145.37

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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.