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Finding the Fourth Proportional to 641,583.78, 885,426.69 and 369,646.75

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Solution

The fourth proportional to 641,583.78, 885,426.69 and 369,646.75 is: 510,136.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,583.78 : 885,426.69 = 369,646.75 : x
  2. Step 2: Convert to fraction form
    641,583.78/885,426.69 = 369,646.75/x
  3. Step 3: Cross multiply
    641,583.78x = 885,426.69 × 369,646.75
  4. Step 4: Simplify right side
    641,583.78x = 327,295,098,321.76
  5. Step 5: Solve for x
    x = 327,295,098,321.76/641,583.78
  6. Step 6: Final answer
    x = 510,136.18

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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.