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Finding the Fourth Proportional to 649,212.60, 973,818.90 and 639,881.40

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Solution

The fourth proportional to 649,212.60, 973,818.90 and 639,881.40 is: 959,822.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,212.60 : 973,818.90 = 639,881.40 : x
  2. Step 2: Convert to fraction form
    649,212.60/973,818.90 = 639,881.40/x
  3. Step 3: Cross multiply
    649,212.60x = 973,818.90 × 639,881.40
  4. Step 4: Simplify right side
    649,212.60x = 623,128,601,078.46
  5. Step 5: Solve for x
    x = 623,128,601,078.46/649,212.60
  6. Step 6: Final answer
    x = 959,822.10

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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.