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Finding the Fourth Proportional to 401,694.72, 554,338.46 and 220,407.81

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Solution

The fourth proportional to 401,694.72, 554,338.46 and 220,407.81 is: 304,162.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,694.72 : 554,338.46 = 220,407.81 : x
  2. Step 2: Convert to fraction form
    401,694.72/554,338.46 = 220,407.81/x
  3. Step 3: Cross multiply
    401,694.72x = 554,338.46 × 220,407.81
  4. Step 4: Simplify right side
    401,694.72x = 122,180,526,518.39
  5. Step 5: Solve for x
    x = 122,180,526,518.39/401,694.72
  6. Step 6: Final answer
    x = 304,162.64

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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.