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Finding the Fourth Proportional to 323,680.40, 485,666.40 and 155,135.60

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Solution

The fourth proportional to 323,680.40, 485,666.40 and 155,135.60 is: 232,773.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,680.40 : 485,666.40 = 155,135.60 : x
  2. Step 2: Convert to fraction form
    323,680.40/485,666.40 = 155,135.60/x
  3. Step 3: Cross multiply
    323,680.40x = 485,666.40 × 155,135.60
  4. Step 4: Simplify right side
    323,680.40x = 75,344,148,363.84
  5. Step 5: Solve for x
    x = 75,344,148,363.84/323,680.40
  6. Step 6: Final answer
    x = 232,773.28

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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.