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Finding the Fourth Proportional to 428,997.69, 591,991.07 and 237,999.69

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Solution

The fourth proportional to 428,997.69, 591,991.07 and 237,999.69 is: 328,425.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,997.69 : 591,991.07 = 237,999.69 : x
  2. Step 2: Convert to fraction form
    428,997.69/591,991.07 = 237,999.69/x
  3. Step 3: Cross multiply
    428,997.69x = 591,991.07 × 237,999.69
  4. Step 4: Simplify right side
    428,997.69x = 140,893,689,952.77
  5. Step 5: Solve for x
    x = 140,893,689,952.77/428,997.69
  6. Step 6: Final answer
    x = 328,425.29

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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.