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Finding the Fourth Proportional to 515,676.32, 711,622.28 and 286,220.24

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Solution

The fourth proportional to 515,676.32, 711,622.28 and 286,220.24 is: 394,977.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,676.32 : 711,622.28 = 286,220.24 : x
  2. Step 2: Convert to fraction form
    515,676.32/711,622.28 = 286,220.24/x
  3. Step 3: Cross multiply
    515,676.32x = 711,622.28 × 286,220.24
  4. Step 4: Simplify right side
    515,676.32x = 203,680,699,770.95
  5. Step 5: Solve for x
    x = 203,680,699,770.95/515,676.32
  6. Step 6: Final answer
    x = 394,977.80

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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.