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Finding the Fourth Proportional to 663,820.56, 916,143.48 and 405,848.88

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Solution

The fourth proportional to 663,820.56, 916,143.48 and 405,848.88 is: 560,114.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,820.56 : 916,143.48 = 405,848.88 : x
  2. Step 2: Convert to fraction form
    663,820.56/916,143.48 = 405,848.88/x
  3. Step 3: Cross multiply
    663,820.56x = 916,143.48 × 405,848.88
  4. Step 4: Simplify right side
    663,820.56x = 371,815,805,277.30
  5. Step 5: Solve for x
    x = 371,815,805,277.30/663,820.56
  6. Step 6: Final answer
    x = 560,114.93

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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.