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Finding the Fourth Proportional to 613,270.40, 919,905.60 and 213,778.40

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Solution

The fourth proportional to 613,270.40, 919,905.60 and 213,778.40 is: 320,667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,270.40 : 919,905.60 = 213,778.40 : x
  2. Step 2: Convert to fraction form
    613,270.40/919,905.60 = 213,778.40/x
  3. Step 3: Cross multiply
    613,270.40x = 919,905.60 × 213,778.40
  4. Step 4: Simplify right side
    613,270.40x = 196,655,947,319.04
  5. Step 5: Solve for x
    x = 196,655,947,319.04/613,270.40
  6. Step 6: Final answer
    x = 320,667.60

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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.