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Finding the Fourth Proportional to 906,909.80, 1,360,364.70 and 308,546.60

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Solution

The fourth proportional to 906,909.80, 1,360,364.70 and 308,546.60 is: 462,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    906,909.80 : 1,360,364.70 = 308,546.60 : x
  2. Step 2: Convert to fraction form
    906,909.80/1,360,364.70 = 308,546.60/x
  3. Step 3: Cross multiply
    906,909.80x = 1,360,364.70 × 308,546.60
  4. Step 4: Simplify right side
    906,909.80x = 419,735,902,945.02
  5. Step 5: Solve for x
    x = 419,735,902,945.02/906,909.80
  6. Step 6: Final answer
    x = 462,819.90

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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.