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Finding the Fourth Proportional to 400,956.44, 553,319.56 and 219,679.64

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Solution

The fourth proportional to 400,956.44, 553,319.56 and 219,679.64 is: 303,157.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,956.44 : 553,319.56 = 219,679.64 : x
  2. Step 2: Convert to fraction form
    400,956.44/553,319.56 = 219,679.64/x
  3. Step 3: Cross multiply
    400,956.44x = 553,319.56 × 219,679.64
  4. Step 4: Simplify right side
    400,956.44x = 121,553,041,745.76
  5. Step 5: Solve for x
    x = 121,553,041,745.76/400,956.44
  6. Step 6: Final answer
    x = 303,157.72

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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.