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Finding the Fourth Proportional to 393,426.62, 543,124.80 and 257,668.60

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Solution

The fourth proportional to 393,426.62, 543,124.80 and 257,668.60 is: 355,711.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,426.62 : 543,124.80 = 257,668.60 : x
  2. Step 2: Convert to fraction form
    393,426.62/543,124.80 = 257,668.60/x
  3. Step 3: Cross multiply
    393,426.62x = 543,124.80 × 257,668.60
  4. Step 4: Simplify right side
    393,426.62x = 139,946,206,841.28
  5. Step 5: Solve for x
    x = 139,946,206,841.28/393,426.62
  6. Step 6: Final answer
    x = 355,711.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.