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Finding the Fourth Proportional to 579,416.80, 869,211.60 and 205,410.40

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Solution

The fourth proportional to 579,416.80, 869,211.60 and 205,410.40 is: 308,146.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,416.80 : 869,211.60 = 205,410.40 : x
  2. Step 2: Convert to fraction form
    579,416.80/869,211.60 = 205,410.40/x
  3. Step 3: Cross multiply
    579,416.80x = 869,211.60 × 205,410.40
  4. Step 4: Simplify right side
    579,416.80x = 178,545,102,440.64
  5. Step 5: Solve for x
    x = 178,545,102,440.64/579,416.80
  6. Step 6: Final answer
    x = 308,146.23

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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.