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Finding the Fourth Proportional to 400,871.96, 553,183.65 and 219,584.70

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Solution

The fourth proportional to 400,871.96, 553,183.65 and 219,584.70 is: 303,016.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,871.96 : 553,183.65 = 219,584.70 : x
  2. Step 2: Convert to fraction form
    400,871.96/553,183.65 = 219,584.70/x
  3. Step 3: Cross multiply
    400,871.96x = 553,183.65 × 219,584.70
  4. Step 4: Simplify right side
    400,871.96x = 121,470,665,830.16
  5. Step 5: Solve for x
    x = 121,470,665,830.16/400,871.96
  6. Step 6: Final answer
    x = 303,016.12

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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.