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Finding the Fourth Proportional to 631,390.67, 871,308.20 and 344,903.39

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Solution

The fourth proportional to 631,390.67, 871,308.20 and 344,903.39 is: 475,960.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,390.67 : 871,308.20 = 344,903.39 : x
  2. Step 2: Convert to fraction form
    631,390.67/871,308.20 = 344,903.39/x
  3. Step 3: Cross multiply
    631,390.67x = 871,308.20 × 344,903.39
  4. Step 4: Simplify right side
    631,390.67x = 300,517,150,190.28
  5. Step 5: Solve for x
    x = 300,517,150,190.28/631,390.67
  6. Step 6: Final answer
    x = 475,960.71

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.