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Finding the Fourth Proportional to 621,736.80, 932,605.20 and 266,690.40

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Solution

The fourth proportional to 621,736.80, 932,605.20 and 266,690.40 is: 400,035.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,736.80 : 932,605.20 = 266,690.40 : x
  2. Step 2: Convert to fraction form
    621,736.80/932,605.20 = 266,690.40/x
  3. Step 3: Cross multiply
    621,736.80x = 932,605.20 × 266,690.40
  4. Step 4: Simplify right side
    621,736.80x = 248,716,853,830.08
  5. Step 5: Solve for x
    x = 248,716,853,830.08/621,736.80
  6. Step 6: Final answer
    x = 400,035.60

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Similar ratio
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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.