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Finding the Fourth Proportional to 401,171.64, 553,621.20 and 219,879.66

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Solution

The fourth proportional to 401,171.64, 553,621.20 and 219,879.66 is: 303,436.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,171.64 : 553,621.20 = 219,879.66 : x
  2. Step 2: Convert to fraction form
    401,171.64/553,621.20 = 219,879.66/x
  3. Step 3: Cross multiply
    401,171.64x = 553,621.20 × 219,879.66
  4. Step 4: Simplify right side
    401,171.64x = 121,730,041,224.79
  5. Step 5: Solve for x
    x = 121,730,041,224.79/401,171.64
  6. Step 6: Final answer
    x = 303,436.31

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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.