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Finding the Fourth Proportional to 573,445.13, 791,355.20 and 318,796.31

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Solution

The fourth proportional to 573,445.13, 791,355.20 and 318,796.31 is: 439,939.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    573,445.13 : 791,355.20 = 318,796.31 : x
  2. Step 2: Convert to fraction form
    573,445.13/791,355.20 = 318,796.31/x
  3. Step 3: Cross multiply
    573,445.13x = 791,355.20 × 318,796.31
  4. Step 4: Simplify right side
    573,445.13x = 252,281,118,043.72
  5. Step 5: Solve for x
    x = 252,281,118,043.72/573,445.13
  6. Step 6: Final answer
    x = 439,939.42

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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.