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Finding the Fourth Proportional to 687,895, 949,295.16 and 386,089

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Solution

The fourth proportional to 687,895, 949,295.16 and 386,089 is: 532,802.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,895 : 949,295.16 = 386,089 : x
  2. Step 2: Convert to fraction form
    687,895/949,295.16 = 386,089/x
  3. Step 3: Cross multiply
    687,895x = 949,295.16 × 386,089
  4. Step 4: Simplify right side
    687,895x = 366,512,419,029.24
  5. Step 5: Solve for x
    x = 366,512,419,029.24/687,895
  6. Step 6: Final answer
    x = 532,802.85

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.