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Finding the Fourth Proportional to 660,867.40, 992,078.70 and 656,201.80

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Solution

The fourth proportional to 660,867.40, 992,078.70 and 656,201.80 is: 985,074.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,867.40 : 992,078.70 = 656,201.80 : x
  2. Step 2: Convert to fraction form
    660,867.40/992,078.70 = 656,201.80/x
  3. Step 3: Cross multiply
    660,867.40x = 992,078.70 × 656,201.80
  4. Step 4: Simplify right side
    660,867.40x = 651,003,828,681.66
  5. Step 5: Solve for x
    x = 651,003,828,681.66/660,867.40
  6. Step 6: Final answer
    x = 985,074.81

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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.