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Finding the Fourth Proportional to 478,651.21, 660,538.68 and 263,791.28

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Solution

The fourth proportional to 478,651.21, 660,538.68 and 263,791.28 is: 364,031.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,651.21 : 660,538.68 = 263,791.28 : x
  2. Step 2: Convert to fraction form
    478,651.21/660,538.68 = 263,791.28/x
  3. Step 3: Cross multiply
    478,651.21x = 660,538.68 × 263,791.28
  4. Step 4: Simplify right side
    478,651.21x = 174,244,343,227.23
  5. Step 5: Solve for x
    x = 174,244,343,227.23/478,651.21
  6. Step 6: Final answer
    x = 364,031.97

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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.