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Finding the Fourth Proportional to 323,285.60, 484,928.40 and 86,664.80

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Solution

The fourth proportional to 323,285.60, 484,928.40 and 86,664.80 is: 129,997.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,285.60 : 484,928.40 = 86,664.80 : x
  2. Step 2: Convert to fraction form
    323,285.60/484,928.40 = 86,664.80/x
  3. Step 3: Cross multiply
    323,285.60x = 484,928.40 × 86,664.80
  4. Step 4: Simplify right side
    323,285.60x = 42,026,222,800.32
  5. Step 5: Solve for x
    x = 42,026,222,800.32/323,285.60
  6. Step 6: Final answer
    x = 129,997.20

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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.