Home / 854,629.12-1,281,039.72-321,919.66

Finding the Fourth Proportional to 854,629.12, 1,281,039.72 and 321,919.66

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Solution

The fourth proportional to 854,629.12, 1,281,039.72 and 321,919.66 is: 482,538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,629.12 : 1,281,039.72 = 321,919.66 : x
  2. Step 2: Convert to fraction form
    854,629.12/1,281,039.72 = 321,919.66/x
  3. Step 3: Cross multiply
    854,629.12x = 1,281,039.72 × 321,919.66
  4. Step 4: Simplify right side
    854,629.12x = 412,391,871,108.90
  5. Step 5: Solve for x
    x = 412,391,871,108.90/854,629.12
  6. Step 6: Final answer
    x = 482,538.99

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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.