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Finding the Fourth Proportional to 647,928.20, 894,301.01 and 393,492.62

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Solution

The fourth proportional to 647,928.20, 894,301.01 and 393,492.62 is: 543,117.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,928.20 : 894,301.01 = 393,492.62 : x
  2. Step 2: Convert to fraction form
    647,928.20/894,301.01 = 393,492.62/x
  3. Step 3: Cross multiply
    647,928.20x = 894,301.01 × 393,492.62
  4. Step 4: Simplify right side
    647,928.20x = 351,900,841,054.58
  5. Step 5: Solve for x
    x = 351,900,841,054.58/647,928.20
  6. Step 6: Final answer
    x = 543,117.04

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Why These Related Problems?

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