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Finding the Fourth Proportional to 643,186.09, 963,492.72 and 386,877.14

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Solution

The fourth proportional to 643,186.09, 963,492.72 and 386,877.14 is: 579,541.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,186.09 : 963,492.72 = 386,877.14 : x
  2. Step 2: Convert to fraction form
    643,186.09/963,492.72 = 386,877.14/x
  3. Step 3: Cross multiply
    643,186.09x = 963,492.72 × 386,877.14
  4. Step 4: Simplify right side
    643,186.09x = 372,753,304,735.63
  5. Step 5: Solve for x
    x = 372,753,304,735.63/643,186.09
  6. Step 6: Final answer
    x = 579,541.92

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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.