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Finding the Fourth Proportional to 711,745.60, 982,208.89 and 389,455.68

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Solution

The fourth proportional to 711,745.60, 982,208.89 and 389,455.68 is: 537,448.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,745.60 : 982,208.89 = 389,455.68 : x
  2. Step 2: Convert to fraction form
    711,745.60/982,208.89 = 389,455.68/x
  3. Step 3: Cross multiply
    711,745.60x = 982,208.89 × 389,455.68
  4. Step 4: Simplify right side
    711,745.60x = 382,526,831,755.18
  5. Step 5: Solve for x
    x = 382,526,831,755.18/711,745.60
  6. Step 6: Final answer
    x = 537,448.82

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1.5x scale

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.