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Finding the Fourth Proportional to 649,213.60, 973,820.40 and 639,882.40

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Solution

The fourth proportional to 649,213.60, 973,820.40 and 639,882.40 is: 959,823.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,213.60 : 973,820.40 = 639,882.40 : x
  2. Step 2: Convert to fraction form
    649,213.60/973,820.40 = 639,882.40/x
  3. Step 3: Cross multiply
    649,213.60x = 973,820.40 × 639,882.40
  4. Step 4: Simplify right side
    649,213.60x = 623,130,534,720.96
  5. Step 5: Solve for x
    x = 623,130,534,720.96/649,213.60
  6. Step 6: Final answer
    x = 959,823.60

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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.