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Finding the Fourth Proportional to 638,187.40, 956,114.70 and 388,577.80

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Solution

The fourth proportional to 638,187.40, 956,114.70 and 388,577.80 is: 582,156.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,187.40 : 956,114.70 = 388,577.80 : x
  2. Step 2: Convert to fraction form
    638,187.40/956,114.70 = 388,577.80/x
  3. Step 3: Cross multiply
    638,187.40x = 956,114.70 × 388,577.80
  4. Step 4: Simplify right side
    638,187.40x = 371,524,946,673.66
  5. Step 5: Solve for x
    x = 371,524,946,673.66/638,187.40
  6. Step 6: Final answer
    x = 582,156.51

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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.