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Finding the Fourth Proportional to 428,587.20, 591,485.28 and 237,660.48

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Solution

The fourth proportional to 428,587.20, 591,485.28 and 237,660.48 is: 327,990.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,587.20 : 591,485.28 = 237,660.48 : x
  2. Step 2: Convert to fraction form
    428,587.20/591,485.28 = 237,660.48/x
  3. Step 3: Cross multiply
    428,587.20x = 591,485.28 × 237,660.48
  4. Step 4: Simplify right side
    428,587.20x = 140,572,675,557.73
  5. Step 5: Solve for x
    x = 140,572,675,557.73/428,587.20
  6. Step 6: Final answer
    x = 327,990.84

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.