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Finding the Fourth Proportional to 639,003.80, 958,141.20 and 239,657.60

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Solution

The fourth proportional to 639,003.80, 958,141.20 and 239,657.60 is: 359,349.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,003.80 : 958,141.20 = 239,657.60 : x
  2. Step 2: Convert to fraction form
    639,003.80/958,141.20 = 239,657.60/x
  3. Step 3: Cross multiply
    639,003.80x = 958,141.20 × 239,657.60
  4. Step 4: Simplify right side
    639,003.80x = 229,625,820,453.12
  5. Step 5: Solve for x
    x = 229,625,820,453.12/639,003.80
  6. Step 6: Final answer
    x = 359,349.69

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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.