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Finding the Fourth Proportional to 428,761.67, 591,687.05 and 235,165.43

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Solution

The fourth proportional to 428,761.67, 591,687.05 and 235,165.43 is: 324,526.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,761.67 : 591,687.05 = 235,165.43 : x
  2. Step 2: Convert to fraction form
    428,761.67/591,687.05 = 235,165.43/x
  3. Step 3: Cross multiply
    428,761.67x = 591,687.05 × 235,165.43
  4. Step 4: Simplify right side
    428,761.67x = 139,144,338,498.04
  5. Step 5: Solve for x
    x = 139,144,338,498.04/428,761.67
  6. Step 6: Final answer
    x = 324,526.07

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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.