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Finding the Fourth Proportional to 323,615.20, 485,336.40 and 98,975.20

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Solution

The fourth proportional to 323,615.20, 485,336.40 and 98,975.20 is: 148,436.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,615.20 : 485,336.40 = 98,975.20 : x
  2. Step 2: Convert to fraction form
    323,615.20/485,336.40 = 98,975.20/x
  3. Step 3: Cross multiply
    323,615.20x = 485,336.40 × 98,975.20
  4. Step 4: Simplify right side
    323,615.20x = 48,036,267,257.28
  5. Step 5: Solve for x
    x = 48,036,267,257.28/323,615.20
  6. Step 6: Final answer
    x = 148,436.38

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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.