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Finding the Fourth Proportional to 401,455.69, 554,016.41 and 220,156.79

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Solution

The fourth proportional to 401,455.69, 554,016.41 and 220,156.79 is: 303,820.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,455.69 : 554,016.41 = 220,156.79 : x
  2. Step 2: Convert to fraction form
    401,455.69/554,016.41 = 220,156.79/x
  3. Step 3: Cross multiply
    401,455.69x = 554,016.41 × 220,156.79
  4. Step 4: Simplify right side
    401,455.69x = 121,970,471,387.65
  5. Step 5: Solve for x
    x = 121,970,471,387.65/401,455.69
  6. Step 6: Final answer
    x = 303,820.50

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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.