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Finding the Fourth Proportional to 353,692.55, 530,218.78 and 129,000.31

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Solution

The fourth proportional to 353,692.55, 530,218.78 and 129,000.31 is: 193,383.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,692.55 : 530,218.78 = 129,000.31 : x
  2. Step 2: Convert to fraction form
    353,692.55/530,218.78 = 129,000.31/x
  3. Step 3: Cross multiply
    353,692.55x = 530,218.78 × 129,000.31
  4. Step 4: Simplify right side
    353,692.55x = 68,398,385,339.77
  5. Step 5: Solve for x
    x = 68,398,385,339.77/353,692.55
  6. Step 6: Final answer
    x = 193,383.73

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1.5x scale

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.