Home / 427,191.12-639,605.52-321,690.24

Finding the Fourth Proportional to 427,191.12, 639,605.52 and 321,690.24

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Solution

The fourth proportional to 427,191.12, 639,605.52 and 321,690.24 is: 481,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,191.12 : 639,605.52 = 321,690.24 : x
  2. Step 2: Convert to fraction form
    427,191.12/639,605.52 = 321,690.24/x
  3. Step 3: Cross multiply
    427,191.12x = 639,605.52 × 321,690.24
  4. Step 4: Simplify right side
    427,191.12x = 205,754,853,234.13
  5. Step 5: Solve for x
    x = 205,754,853,234.13/427,191.12
  6. Step 6: Final answer
    x = 481,645.90

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1.5x scale

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.