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Finding the Fourth Proportional to 656,939.80, 985,668.90 and 257,512.60

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Solution

The fourth proportional to 656,939.80, 985,668.90 and 257,512.60 is: 386,370.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,939.80 : 985,668.90 = 257,512.60 : x
  2. Step 2: Convert to fraction form
    656,939.80/985,668.90 = 257,512.60/x
  3. Step 3: Cross multiply
    656,939.80x = 985,668.90 × 257,512.60
  4. Step 4: Simplify right side
    656,939.80x = 253,822,161,178.14
  5. Step 5: Solve for x
    x = 253,822,161,178.14/656,939.80
  6. Step 6: Final answer
    x = 386,370.50

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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.