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Finding the Fourth Proportional to 632,486.70, 948,730.05 and 419,910.30

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Solution

The fourth proportional to 632,486.70, 948,730.05 and 419,910.30 is: 629,865.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,486.70 : 948,730.05 = 419,910.30 : x
  2. Step 2: Convert to fraction form
    632,486.70/948,730.05 = 419,910.30/x
  3. Step 3: Cross multiply
    632,486.70x = 948,730.05 × 419,910.30
  4. Step 4: Simplify right side
    632,486.70x = 398,381,519,914.52
  5. Step 5: Solve for x
    x = 398,381,519,914.52/632,486.70
  6. Step 6: Final answer
    x = 629,865.45

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Double scale
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Similar ratio
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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.