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Finding the Fourth Proportional to 457,774.40, 686,661.60 and 431,969.60

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Solution

The fourth proportional to 457,774.40, 686,661.60 and 431,969.60 is: 647,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,774.40 : 686,661.60 = 431,969.60 : x
  2. Step 2: Convert to fraction form
    457,774.40/686,661.60 = 431,969.60/x
  3. Step 3: Cross multiply
    457,774.40x = 686,661.60 × 431,969.60
  4. Step 4: Simplify right side
    457,774.40x = 296,616,936,687.36
  5. Step 5: Solve for x
    x = 296,616,936,687.36/457,774.40
  6. Step 6: Final answer
    x = 647,954.40

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Similar ratio
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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.