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Finding the Fourth Proportional to 631,368.81, 871,308.09 and 344,907.36

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Solution

The fourth proportional to 631,368.81, 871,308.09 and 344,907.36 is: 475,982.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,368.81 : 871,308.09 = 344,907.36 : x
  2. Step 2: Convert to fraction form
    631,368.81/871,308.09 = 344,907.36/x
  3. Step 3: Cross multiply
    631,368.81x = 871,308.09 × 344,907.36
  4. Step 4: Simplify right side
    631,368.81x = 300,520,573,068.54
  5. Step 5: Solve for x
    x = 300,520,573,068.54/631,368.81
  6. Step 6: Final answer
    x = 475,982.61

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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.