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Finding the Fourth Proportional to 645,817.20, 968,610.60 and 408,735.60

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Solution

The fourth proportional to 645,817.20, 968,610.60 and 408,735.60 is: 613,030.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,817.20 : 968,610.60 = 408,735.60 : x
  2. Step 2: Convert to fraction form
    645,817.20/968,610.60 = 408,735.60/x
  3. Step 3: Cross multiply
    645,817.20x = 968,610.60 × 408,735.60
  4. Step 4: Simplify right side
    645,817.20x = 395,905,634,757.36
  5. Step 5: Solve for x
    x = 395,905,634,757.36/645,817.20
  6. Step 6: Final answer
    x = 613,030.49

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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.