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Finding the Fourth Proportional to 521,570.40, 782,355.60 and 147,593.40

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Solution

The fourth proportional to 521,570.40, 782,355.60 and 147,593.40 is: 221,390.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,570.40 : 782,355.60 = 147,593.40 : x
  2. Step 2: Convert to fraction form
    521,570.40/782,355.60 = 147,593.40/x
  3. Step 3: Cross multiply
    521,570.40x = 782,355.60 × 147,593.40
  4. Step 4: Simplify right side
    521,570.40x = 115,470,523,013.04
  5. Step 5: Solve for x
    x = 115,470,523,013.04/521,570.40
  6. Step 6: Final answer
    x = 221,390.10

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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.