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Finding the Fourth Proportional to 193,903.20, 290,854.80 and 191,138.40

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Solution

The fourth proportional to 193,903.20, 290,854.80 and 191,138.40 is: 286,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    193,903.20 : 290,854.80 = 191,138.40 : x
  2. Step 2: Convert to fraction form
    193,903.20/290,854.80 = 191,138.40/x
  3. Step 3: Cross multiply
    193,903.20x = 290,854.80 × 191,138.40
  4. Step 4: Simplify right side
    193,903.20x = 55,593,521,104.32
  5. Step 5: Solve for x
    x = 55,593,521,104.32/193,903.20
  6. Step 6: Final answer
    x = 286,707.60

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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.