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Finding the Fourth Proportional to 485,532.40, 728,125.80 and 219,420.40

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Solution

The fourth proportional to 485,532.40, 728,125.80 and 219,420.40 is: 329,052.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,532.40 : 728,125.80 = 219,420.40 : x
  2. Step 2: Convert to fraction form
    485,532.40/728,125.80 = 219,420.40/x
  3. Step 3: Cross multiply
    485,532.40x = 728,125.80 × 219,420.40
  4. Step 4: Simplify right side
    485,532.40x = 159,765,654,286.32
  5. Step 5: Solve for x
    x = 159,765,654,286.32/485,532.40
  6. Step 6: Final answer
    x = 329,052.51

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.