Home / 427,157.28-641,786.40-321,656.16

Finding the Fourth Proportional to 427,157.28, 641,786.40 and 321,656.16

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Solution

The fourth proportional to 427,157.28, 641,786.40 and 321,656.16 is: 483,275.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,157.28 : 641,786.40 = 321,656.16 : x
  2. Step 2: Convert to fraction form
    427,157.28/641,786.40 = 321,656.16/x
  3. Step 3: Cross multiply
    427,157.28x = 641,786.40 × 321,656.16
  4. Step 4: Simplify right side
    427,157.28x = 206,434,548,964.22
  5. Step 5: Solve for x
    x = 206,434,548,964.22/427,157.28
  6. Step 6: Final answer
    x = 483,275.27

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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.