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Finding the Fourth Proportional to 612,958.40, 919,437.60 and 531,857.60

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Solution

The fourth proportional to 612,958.40, 919,437.60 and 531,857.60 is: 797,786.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,958.40 : 919,437.60 = 531,857.60 : x
  2. Step 2: Convert to fraction form
    612,958.40/919,437.60 = 531,857.60/x
  3. Step 3: Cross multiply
    612,958.40x = 919,437.60 × 531,857.60
  4. Step 4: Simplify right side
    612,958.40x = 489,009,875,285.76
  5. Step 5: Solve for x
    x = 489,009,875,285.76/612,958.40
  6. Step 6: Final answer
    x = 797,786.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.