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Finding the Fourth Proportional to 647,011.20, 970,286.40 and 292,195.20

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Solution

The fourth proportional to 647,011.20, 970,286.40 and 292,195.20 is: 438,188.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,011.20 : 970,286.40 = 292,195.20 : x
  2. Step 2: Convert to fraction form
    647,011.20/970,286.40 = 292,195.20/x
  3. Step 3: Cross multiply
    647,011.20x = 970,286.40 × 292,195.20
  4. Step 4: Simplify right side
    647,011.20x = 283,513,028,705.28
  5. Step 5: Solve for x
    x = 283,513,028,705.28/647,011.20
  6. Step 6: Final answer
    x = 438,188.75

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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.