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Finding the Fourth Proportional to 368,795.80, 553,171.83 and 128,892.84

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Solution

The fourth proportional to 368,795.80, 553,171.83 and 128,892.84 is: 193,331.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,795.80 : 553,171.83 = 128,892.84 : x
  2. Step 2: Convert to fraction form
    368,795.80/553,171.83 = 128,892.84/x
  3. Step 3: Cross multiply
    368,795.80x = 553,171.83 × 128,892.84
  4. Step 4: Simplify right side
    368,795.80x = 71,299,888,176.70
  5. Step 5: Solve for x
    x = 71,299,888,176.70/368,795.80
  6. Step 6: Final answer
    x = 193,331.62

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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.