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Finding the Fourth Proportional to 525,639.60, 788,286.60 and 193,172.40

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Solution

The fourth proportional to 525,639.60, 788,286.60 and 193,172.40 is: 289,695.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,639.60 : 788,286.60 = 193,172.40 : x
  2. Step 2: Convert to fraction form
    525,639.60/788,286.60 = 193,172.40/x
  3. Step 3: Cross multiply
    525,639.60x = 788,286.60 × 193,172.40
  4. Step 4: Simplify right side
    525,639.60x = 152,275,214,409.84
  5. Step 5: Solve for x
    x = 152,275,214,409.84/525,639.60
  6. Step 6: Final answer
    x = 289,695.10

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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.