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Finding the Fourth Proportional to 401,305.80, 553,801.86 and 220,013.85

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Solution

The fourth proportional to 401,305.80, 553,801.86 and 220,013.85 is: 303,619.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,305.80 : 553,801.86 = 220,013.85 : x
  2. Step 2: Convert to fraction form
    401,305.80/553,801.86 = 220,013.85/x
  3. Step 3: Cross multiply
    401,305.80x = 553,801.86 × 220,013.85
  4. Step 4: Simplify right side
    401,305.80x = 121,844,079,355.76
  5. Step 5: Solve for x
    x = 121,844,079,355.76/401,305.80
  6. Step 6: Final answer
    x = 303,619.03

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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.