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Finding the Fourth Proportional to 428,490.27, 591,299.60 and 234,893.79

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Solution

The fourth proportional to 428,490.27, 591,299.60 and 234,893.79 is: 324,144.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,490.27 : 591,299.60 = 234,893.79 : x
  2. Step 2: Convert to fraction form
    428,490.27/591,299.60 = 234,893.79/x
  3. Step 3: Cross multiply
    428,490.27x = 591,299.60 × 234,893.79
  4. Step 4: Simplify right side
    428,490.27x = 138,892,602,895.02
  5. Step 5: Solve for x
    x = 138,892,602,895.02/428,490.27
  6. Step 6: Final answer
    x = 324,144.12

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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.