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Finding the Fourth Proportional to 401,016.72, 553,396.44 and 219,726.96

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Solution

The fourth proportional to 401,016.72, 553,396.44 and 219,726.96 is: 303,219.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,016.72 : 553,396.44 = 219,726.96 : x
  2. Step 2: Convert to fraction form
    401,016.72/553,396.44 = 219,726.96/x
  3. Step 3: Cross multiply
    401,016.72x = 553,396.44 × 219,726.96
  4. Step 4: Simplify right side
    401,016.72x = 121,596,117,436.02
  5. Step 5: Solve for x
    x = 121,596,117,436.02/401,016.72
  6. Step 6: Final answer
    x = 303,219.57

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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.