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Finding the Fourth Proportional to 283,840.56, 391,697.64 and 156,511.80

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Solution

The fourth proportional to 283,840.56, 391,697.64 and 156,511.80 is: 215,985.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,840.56 : 391,697.64 = 156,511.80 : x
  2. Step 2: Convert to fraction form
    283,840.56/391,697.64 = 156,511.80/x
  3. Step 3: Cross multiply
    283,840.56x = 391,697.64 × 156,511.80
  4. Step 4: Simplify right side
    283,840.56x = 61,305,302,692.15
  5. Step 5: Solve for x
    x = 61,305,302,692.15/283,840.56
  6. Step 6: Final answer
    x = 215,985.00

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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.