Home / 647,519.30-971,716.35-422,331.20

Finding the Fourth Proportional to 647,519.30, 971,716.35 and 422,331.20

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Solution

The fourth proportional to 647,519.30, 971,716.35 and 422,331.20 is: 633,782.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,519.30 : 971,716.35 = 422,331.20 : x
  2. Step 2: Convert to fraction form
    647,519.30/971,716.35 = 422,331.20/x
  3. Step 3: Cross multiply
    647,519.30x = 971,716.35 × 422,331.20
  4. Step 4: Simplify right side
    647,519.30x = 410,386,132,155.12
  5. Step 5: Solve for x
    x = 410,386,132,155.12/647,519.30
  6. Step 6: Final answer
    x = 633,782.09

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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.