Home / 400,821.54-553,142.64-228,736.05

Finding the Fourth Proportional to 400,821.54, 553,142.64 and 228,736.05

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Solution

The fourth proportional to 400,821.54, 553,142.64 and 228,736.05 is: 315,660.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,821.54 : 553,142.64 = 228,736.05 : x
  2. Step 2: Convert to fraction form
    400,821.54/553,142.64 = 228,736.05/x
  3. Step 3: Cross multiply
    400,821.54x = 553,142.64 × 228,736.05
  4. Step 4: Simplify right side
    400,821.54x = 126,523,662,560.17
  5. Step 5: Solve for x
    x = 126,523,662,560.17/400,821.54
  6. Step 6: Final answer
    x = 315,660.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.