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Finding the Fourth Proportional to 400,871.51, 553,211.61 and 228,786.05

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Solution

The fourth proportional to 400,871.51, 553,211.61 and 228,786.05 is: 315,729.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,871.51 : 553,211.61 = 228,786.05 : x
  2. Step 2: Convert to fraction form
    400,871.51/553,211.61 = 228,786.05/x
  3. Step 3: Cross multiply
    400,871.51x = 553,211.61 × 228,786.05
  4. Step 4: Simplify right side
    400,871.51x = 126,567,099,591.12
  5. Step 5: Solve for x
    x = 126,567,099,591.12/400,871.51
  6. Step 6: Final answer
    x = 315,729.84

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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.