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Finding the Fourth Proportional to 620,948.07, 931,783.50 and 261,092.85

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Solution

The fourth proportional to 620,948.07, 931,783.50 and 261,092.85 is: 391,791.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,948.07 : 931,783.50 = 261,092.85 : x
  2. Step 2: Convert to fraction form
    620,948.07/931,783.50 = 261,092.85/x
  3. Step 3: Cross multiply
    620,948.07x = 931,783.50 × 261,092.85
  4. Step 4: Simplify right side
    620,948.07x = 243,282,009,597.98
  5. Step 5: Solve for x
    x = 243,282,009,597.98/620,948.07
  6. Step 6: Final answer
    x = 391,791.23

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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.