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Finding the Fourth Proportional to 492,793.20, 739,189.80 and 315,646.20

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Solution

The fourth proportional to 492,793.20, 739,189.80 and 315,646.20 is: 473,469.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,793.20 : 739,189.80 = 315,646.20 : x
  2. Step 2: Convert to fraction form
    492,793.20/739,189.80 = 315,646.20/x
  3. Step 3: Cross multiply
    492,793.20x = 739,189.80 × 315,646.20
  4. Step 4: Simplify right side
    492,793.20x = 233,322,451,448.76
  5. Step 5: Solve for x
    x = 233,322,451,448.76/492,793.20
  6. Step 6: Final answer
    x = 473,469.30

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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.