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Finding the Fourth Proportional to 638,659.40, 958,334.70 and 283,728.20

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Solution

The fourth proportional to 638,659.40, 958,334.70 and 283,728.20 is: 425,745.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,659.40 : 958,334.70 = 283,728.20 : x
  2. Step 2: Convert to fraction form
    638,659.40/958,334.70 = 283,728.20/x
  3. Step 3: Cross multiply
    638,659.40x = 958,334.70 × 283,728.20
  4. Step 4: Simplify right side
    638,659.40x = 271,906,579,428.54
  5. Step 5: Solve for x
    x = 271,906,579,428.54/638,659.40
  6. Step 6: Final answer
    x = 425,745.83

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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.