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Finding the Fourth Proportional to 285,486.80, 427,769.40 and 238,485.20

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Solution

The fourth proportional to 285,486.80, 427,769.40 and 238,485.20 is: 357,342.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,486.80 : 427,769.40 = 238,485.20 : x
  2. Step 2: Convert to fraction form
    285,486.80/427,769.40 = 238,485.20/x
  3. Step 3: Cross multiply
    285,486.80x = 427,769.40 × 238,485.20
  4. Step 4: Simplify right side
    285,486.80x = 102,016,670,912.88
  5. Step 5: Solve for x
    x = 102,016,670,912.88/285,486.80
  6. Step 6: Final answer
    x = 357,342.86

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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.