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Finding the Fourth Proportional to 345,667.12, 477,020.40 and 186,691.12

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Solution

The fourth proportional to 345,667.12, 477,020.40 and 186,691.12 is: 257,633.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,667.12 : 477,020.40 = 186,691.12 : x
  2. Step 2: Convert to fraction form
    345,667.12/477,020.40 = 186,691.12/x
  3. Step 3: Cross multiply
    345,667.12x = 477,020.40 × 186,691.12
  4. Step 4: Simplify right side
    345,667.12x = 89,055,472,738.85
  5. Step 5: Solve for x
    x = 89,055,472,738.85/345,667.12
  6. Step 6: Final answer
    x = 257,633.62

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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.