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Finding the Fourth Proportional to 289,638.88, 399,685.20 and 168,799.84

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Solution

The fourth proportional to 289,638.88, 399,685.20 and 168,799.84 is: 232,934.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,638.88 : 399,685.20 = 168,799.84 : x
  2. Step 2: Convert to fraction form
    289,638.88/399,685.20 = 168,799.84/x
  3. Step 3: Cross multiply
    289,638.88x = 399,685.20 × 168,799.84
  4. Step 4: Simplify right side
    289,638.88x = 67,466,797,810.37
  5. Step 5: Solve for x
    x = 67,466,797,810.37/289,638.88
  6. Step 6: Final answer
    x = 232,934.19

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1.5x scale

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.