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Finding the Fourth Proportional to 661,638.20, 992,457.30 and 603,901.40

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Solution

The fourth proportional to 661,638.20, 992,457.30 and 603,901.40 is: 905,852.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,638.20 : 992,457.30 = 603,901.40 : x
  2. Step 2: Convert to fraction form
    661,638.20/992,457.30 = 603,901.40/x
  3. Step 3: Cross multiply
    661,638.20x = 992,457.30 × 603,901.40
  4. Step 4: Simplify right side
    661,638.20x = 599,346,352,910.22
  5. Step 5: Solve for x
    x = 599,346,352,910.22/661,638.20
  6. Step 6: Final answer
    x = 905,852.10

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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.