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Finding the Fourth Proportional to 400,963.64, 553,346.44 and 219,691.31

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Solution

The fourth proportional to 400,963.64, 553,346.44 and 219,691.31 is: 303,183.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,963.64 : 553,346.44 = 219,691.31 : x
  2. Step 2: Convert to fraction form
    400,963.64/553,346.44 = 219,691.31/x
  3. Step 3: Cross multiply
    400,963.64x = 553,346.44 × 219,691.31
  4. Step 4: Simplify right side
    400,963.64x = 121,565,400,971.48
  5. Step 5: Solve for x
    x = 121,565,400,971.48/400,963.64
  6. Step 6: Final answer
    x = 303,183.11

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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.