Home / 3,975.13-5,485.79-2,402.31

Finding the Fourth Proportional to 3,975.13, 5,485.79 and 2,402.31

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Solution

The fourth proportional to 3,975.13, 5,485.79 and 2,402.31 is: 3,315.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,975.13 : 5,485.79 = 2,402.31 : x
  2. Step 2: Convert to fraction form
    3,975.13/5,485.79 = 2,402.31/x
  3. Step 3: Cross multiply
    3,975.13x = 5,485.79 × 2,402.31
  4. Step 4: Simplify right side
    3,975.13x = 13,178,568.17
  5. Step 5: Solve for x
    x = 13,178,568.17/3,975.13
  6. Step 6: Final answer
    x = 3,315.25

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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.