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Finding the Fourth Proportional to 196,459.60, 294,689.40 and 128,808.40

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Solution

The fourth proportional to 196,459.60, 294,689.40 and 128,808.40 is: 193,212.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    196,459.60 : 294,689.40 = 128,808.40 : x
  2. Step 2: Convert to fraction form
    196,459.60/294,689.40 = 128,808.40/x
  3. Step 3: Cross multiply
    196,459.60x = 294,689.40 × 128,808.40
  4. Step 4: Simplify right side
    196,459.60x = 37,958,470,110.96
  5. Step 5: Solve for x
    x = 37,958,470,110.96/196,459.60
  6. Step 6: Final answer
    x = 193,212.60

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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.