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Finding the Fourth Proportional to 647,021.80, 970,532.70 and 619,719.40

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Solution

The fourth proportional to 647,021.80, 970,532.70 and 619,719.40 is: 929,579.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,021.80 : 970,532.70 = 619,719.40 : x
  2. Step 2: Convert to fraction form
    647,021.80/970,532.70 = 619,719.40/x
  3. Step 3: Cross multiply
    647,021.80x = 970,532.70 × 619,719.40
  4. Step 4: Simplify right side
    647,021.80x = 601,457,942,524.38
  5. Step 5: Solve for x
    x = 601,457,942,524.38/647,021.80
  6. Step 6: Final answer
    x = 929,579.10

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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.