Home / 639,435.47-958,945.57-212,856.73

Finding the Fourth Proportional to 639,435.47, 958,945.57 and 212,856.73

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Solution

The fourth proportional to 639,435.47, 958,945.57 and 212,856.73 is: 319,215.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,435.47 : 958,945.57 = 212,856.73 : x
  2. Step 2: Convert to fraction form
    639,435.47/958,945.57 = 212,856.73/x
  3. Step 3: Cross multiply
    639,435.47x = 958,945.57 × 212,856.73
  4. Step 4: Simplify right side
    639,435.47x = 204,118,015,348.68
  5. Step 5: Solve for x
    x = 204,118,015,348.68/639,435.47
  6. Step 6: Final answer
    x = 319,215.97

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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.