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Finding the Fourth Proportional to 401,781.12, 554,452.80 and 220,494.72

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Solution

The fourth proportional to 401,781.12, 554,452.80 and 220,494.72 is: 304,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,781.12 : 554,452.80 = 220,494.72 : x
  2. Step 2: Convert to fraction form
    401,781.12/554,452.80 = 220,494.72/x
  3. Step 3: Cross multiply
    401,781.12x = 554,452.80 × 220,494.72
  4. Step 4: Simplify right side
    401,781.12x = 122,253,914,889.22
  5. Step 5: Solve for x
    x = 122,253,914,889.22/401,781.12
  6. Step 6: Final answer
    x = 304,279.89

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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.