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Finding the Fourth Proportional to 257,156.76, 354,877.54 and 143,979.50

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Solution

The fourth proportional to 257,156.76, 354,877.54 and 143,979.50 is: 198,692.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,156.76 : 354,877.54 = 143,979.50 : x
  2. Step 2: Convert to fraction form
    257,156.76/354,877.54 = 143,979.50/x
  3. Step 3: Cross multiply
    257,156.76x = 354,877.54 × 143,979.50
  4. Step 4: Simplify right side
    257,156.76x = 51,095,090,770.43
  5. Step 5: Solve for x
    x = 51,095,090,770.43/257,156.76
  6. Step 6: Final answer
    x = 198,692.39

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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.