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Finding the Fourth Proportional to 515,692.40, 711,644.46 and 286,236.32

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Solution

The fourth proportional to 515,692.40, 711,644.46 and 286,236.32 is: 394,999.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,692.40 : 711,644.46 = 286,236.32 : x
  2. Step 2: Convert to fraction form
    515,692.40/711,644.46 = 286,236.32/x
  3. Step 3: Cross multiply
    515,692.40x = 711,644.46 × 286,236.32
  4. Step 4: Simplify right side
    515,692.40x = 203,698,491,378.79
  5. Step 5: Solve for x
    x = 203,698,491,378.79/515,692.40
  6. Step 6: Final answer
    x = 394,999.99

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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.