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Finding the Fourth Proportional to 289,031.62, 398,879.13 and 161,699.62

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Solution

The fourth proportional to 289,031.62, 398,879.13 and 161,699.62 is: 223,154.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,031.62 : 398,879.13 = 161,699.62 : x
  2. Step 2: Convert to fraction form
    289,031.62/398,879.13 = 161,699.62/x
  3. Step 3: Cross multiply
    289,031.62x = 398,879.13 × 161,699.62
  4. Step 4: Simplify right side
    289,031.62x = 64,498,603,746.93
  5. Step 5: Solve for x
    x = 64,498,603,746.93/289,031.62
  6. Step 6: Final answer
    x = 223,154.14

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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.