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Finding the Fourth Proportional to 289,520.60, 399,506.18 and 168,636.60

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Solution

The fourth proportional to 289,520.60, 399,506.18 and 168,636.60 is: 232,699.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,520.60 : 399,506.18 = 168,636.60 : x
  2. Step 2: Convert to fraction form
    289,520.60/399,506.18 = 168,636.60/x
  3. Step 3: Cross multiply
    289,520.60x = 399,506.18 × 168,636.60
  4. Step 4: Simplify right side
    289,520.60x = 67,371,363,031.01
  5. Step 5: Solve for x
    x = 67,371,363,031.01/289,520.60
  6. Step 6: Final answer
    x = 232,699.73

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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.