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Finding the Fourth Proportional to 661,112.63, 991,668.85 and 436,420.42

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Solution

The fourth proportional to 661,112.63, 991,668.85 and 436,420.42 is: 654,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,112.63 : 991,668.85 = 436,420.42 : x
  2. Step 2: Convert to fraction form
    661,112.63/991,668.85 = 436,420.42/x
  3. Step 3: Cross multiply
    661,112.63x = 991,668.85 × 436,420.42
  4. Step 4: Simplify right side
    661,112.63x = 432,784,536,017.92
  5. Step 5: Solve for x
    x = 432,784,536,017.92/661,112.63
  6. Step 6: Final answer
    x = 654,630.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.