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Finding the Fourth Proportional to 664,256.60, 996,384.90 and 439,870.40

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Solution

The fourth proportional to 664,256.60, 996,384.90 and 439,870.40 is: 659,805.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,256.60 : 996,384.90 = 439,870.40 : x
  2. Step 2: Convert to fraction form
    664,256.60/996,384.90 = 439,870.40/x
  3. Step 3: Cross multiply
    664,256.60x = 996,384.90 × 439,870.40
  4. Step 4: Simplify right side
    664,256.60x = 438,280,224,516.96
  5. Step 5: Solve for x
    x = 438,280,224,516.96/664,256.60
  6. Step 6: Final answer
    x = 659,805.60

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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.