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Finding the Fourth Proportional to 631,391.17, 871,308.88 and 344,903.89

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Solution

The fourth proportional to 631,391.17, 871,308.88 and 344,903.89 is: 475,961.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,391.17 : 871,308.88 = 344,903.89 : x
  2. Step 2: Convert to fraction form
    631,391.17/871,308.88 = 344,903.89/x
  3. Step 3: Cross multiply
    631,391.17x = 871,308.88 × 344,903.89
  4. Step 4: Simplify right side
    631,391.17x = 300,517,822,103.54
  5. Step 5: Solve for x
    x = 300,517,822,103.54/631,391.17
  6. Step 6: Final answer
    x = 475,961.40

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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.