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Finding the Fourth Proportional to 711,830.15, 982,368.99 and 405,965.55

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Solution

The fourth proportional to 711,830.15, 982,368.99 and 405,965.55 is: 560,257.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,830.15 : 982,368.99 = 405,965.55 : x
  2. Step 2: Convert to fraction form
    711,830.15/982,368.99 = 405,965.55/x
  3. Step 3: Cross multiply
    711,830.15x = 982,368.99 × 405,965.55
  4. Step 4: Simplify right side
    711,830.15x = 398,807,970,250.99
  5. Step 5: Solve for x
    x = 398,807,970,250.99/711,830.15
  6. Step 6: Final answer
    x = 560,257.21

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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.