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Finding the Fourth Proportional to 438,577.98, 605,383.57 and 257,223.74

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Solution

The fourth proportional to 438,577.98, 605,383.57 and 257,223.74 is: 355,054.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,577.98 : 605,383.57 = 257,223.74 : x
  2. Step 2: Convert to fraction form
    438,577.98/605,383.57 = 257,223.74/x
  3. Step 3: Cross multiply
    438,577.98x = 605,383.57 × 257,223.74
  4. Step 4: Simplify right side
    438,577.98x = 155,719,023,304.56
  5. Step 5: Solve for x
    x = 155,719,023,304.56/438,577.98
  6. Step 6: Final answer
    x = 355,054.36

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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.