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Finding the Fourth Proportional to 659,690,553.60, 989,535,830.40 and 644,574,009.60

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Solution

The fourth proportional to 659,690,553.60, 989,535,830.40 and 644,574,009.60 is: 966,861,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,690,553.60 : 989,535,830.40 = 644,574,009.60 : x
  2. Step 2: Convert to fraction form
    659,690,553.60/989,535,830.40 = 644,574,009.60/x
  3. Step 3: Cross multiply
    659,690,553.60x = 989,535,830.40 × 644,574,009.60
  4. Step 4: Simplify right side
    659,690,553.60x = 637,829,077,843,793,536
  5. Step 5: Solve for x
    x = 637,829,077,843,793,536/659,690,553.60
  6. Step 6: Final answer
    x = 966,861,014.40

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Double scale
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Similar ratio
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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.