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Finding the Fourth Proportional to 661,638.70, 992,458.05 and 603,901.90

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Solution

The fourth proportional to 661,638.70, 992,458.05 and 603,901.90 is: 905,852.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,638.70 : 992,458.05 = 603,901.90 : x
  2. Step 2: Convert to fraction form
    661,638.70/992,458.05 = 603,901.90/x
  3. Step 3: Cross multiply
    661,638.70x = 992,458.05 × 603,901.90
  4. Step 4: Simplify right side
    661,638.70x = 599,347,302,065.30
  5. Step 5: Solve for x
    x = 599,347,302,065.30/661,638.70
  6. Step 6: Final answer
    x = 905,852.85

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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.