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Finding the Fourth Proportional to 521,328.12, 782,037.76 and 147,351.12

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Solution

The fourth proportional to 521,328.12, 782,037.76 and 147,351.12 is: 221,039.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,328.12 : 782,037.76 = 147,351.12 : x
  2. Step 2: Convert to fraction form
    521,328.12/782,037.76 = 147,351.12/x
  3. Step 3: Cross multiply
    521,328.12x = 782,037.76 × 147,351.12
  4. Step 4: Simplify right side
    521,328.12x = 115,234,139,818.29
  5. Step 5: Solve for x
    x = 115,234,139,818.29/521,328.12
  6. Step 6: Final answer
    x = 221,039.56

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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.