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Finding the Fourth Proportional to 415,438.20, 573,301.80 and 245,668.68

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Solution

The fourth proportional to 415,438.20, 573,301.80 and 245,668.68 is: 339,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,438.20 : 573,301.80 = 245,668.68 : x
  2. Step 2: Convert to fraction form
    415,438.20/573,301.80 = 245,668.68/x
  3. Step 3: Cross multiply
    415,438.20x = 573,301.80 × 245,668.68
  4. Step 4: Simplify right side
    415,438.20x = 140,842,296,447.62
  5. Step 5: Solve for x
    x = 140,842,296,447.62/415,438.20
  6. Step 6: Final answer
    x = 339,021.05

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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.