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Finding the Fourth Proportional to 401,871.28, 555,042.64 and 264,663.55

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Solution

The fourth proportional to 401,871.28, 555,042.64 and 264,663.55 is: 365,538.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,871.28 : 555,042.64 = 264,663.55 : x
  2. Step 2: Convert to fraction form
    401,871.28/555,042.64 = 264,663.55/x
  3. Step 3: Cross multiply
    401,871.28x = 555,042.64 × 264,663.55
  4. Step 4: Simplify right side
    401,871.28x = 146,899,557,741.83
  5. Step 5: Solve for x
    x = 146,899,557,741.83/401,871.28
  6. Step 6: Final answer
    x = 365,538.83

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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.