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Finding the Fourth Proportional to 431,040.56, 646,560.80 and 164,828

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Solution

The fourth proportional to 431,040.56, 646,560.80 and 164,828 is: 247,241.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,040.56 : 646,560.80 = 164,828 : x
  2. Step 2: Convert to fraction form
    431,040.56/646,560.80 = 164,828/x
  3. Step 3: Cross multiply
    431,040.56x = 646,560.80 × 164,828
  4. Step 4: Simplify right side
    431,040.56x = 106,571,323,542.40
  5. Step 5: Solve for x
    x = 106,571,323,542.40/431,040.56
  6. Step 6: Final answer
    x = 247,241.98

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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.