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Finding the Fourth Proportional to 353,196.10, 529,794.15 and 128,809.90

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Solution

The fourth proportional to 353,196.10, 529,794.15 and 128,809.90 is: 193,214.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,196.10 : 529,794.15 = 128,809.90 : x
  2. Step 2: Convert to fraction form
    353,196.10/529,794.15 = 128,809.90/x
  3. Step 3: Cross multiply
    353,196.10x = 529,794.15 × 128,809.90
  4. Step 4: Simplify right side
    353,196.10x = 68,242,731,482.09
  5. Step 5: Solve for x
    x = 68,242,731,482.09/353,196.10
  6. Step 6: Final answer
    x = 193,214.85

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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.