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Finding the Fourth Proportional to 718,258.60, 991,196.94 and 412,354.81

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Solution

The fourth proportional to 718,258.60, 991,196.94 and 412,354.81 is: 569,049.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,258.60 : 991,196.94 = 412,354.81 : x
  2. Step 2: Convert to fraction form
    718,258.60/991,196.94 = 412,354.81/x
  3. Step 3: Cross multiply
    718,258.60x = 991,196.94 × 412,354.81
  4. Step 4: Simplify right side
    718,258.60x = 408,724,825,866.28
  5. Step 5: Solve for x
    x = 408,724,825,866.28/718,258.60
  6. Step 6: Final answer
    x = 569,049.68

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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.