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Finding the Fourth Proportional to 289,431.98, 399,428.52 and 168,553.76

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Solution

The fourth proportional to 289,431.98, 399,428.52 and 168,553.76 is: 232,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,431.98 : 399,428.52 = 168,553.76 : x
  2. Step 2: Convert to fraction form
    289,431.98/399,428.52 = 168,553.76/x
  3. Step 3: Cross multiply
    289,431.98x = 399,428.52 × 168,553.76
  4. Step 4: Simplify right side
    289,431.98x = 67,325,178,514.80
  5. Step 5: Solve for x
    x = 67,325,178,514.80/289,431.98
  6. Step 6: Final answer
    x = 232,611.40

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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.