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Finding the Fourth Proportional to 283,992.84, 391,911.40 and 156,668.40

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Solution

The fourth proportional to 283,992.84, 391,911.40 and 156,668.40 is: 216,203.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,992.84 : 391,911.40 = 156,668.40 : x
  2. Step 2: Convert to fraction form
    283,992.84/391,911.40 = 156,668.40/x
  3. Step 3: Cross multiply
    283,992.84x = 391,911.40 × 156,668.40
  4. Step 4: Simplify right side
    283,992.84x = 61,400,131,979.76
  5. Step 5: Solve for x
    x = 61,400,131,979.76/283,992.84
  6. Step 6: Final answer
    x = 216,203.10

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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.