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Finding the Fourth Proportional to 641,541.70, 885,300.33 and 355,034.98

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Solution

The fourth proportional to 641,541.70, 885,300.33 and 355,034.98 is: 489,933.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,541.70 : 885,300.33 = 355,034.98 : x
  2. Step 2: Convert to fraction form
    641,541.70/885,300.33 = 355,034.98/x
  3. Step 3: Cross multiply
    641,541.70x = 885,300.33 × 355,034.98
  4. Step 4: Simplify right side
    641,541.70x = 314,312,584,955.54
  5. Step 5: Solve for x
    x = 314,312,584,955.54/641,541.70
  6. Step 6: Final answer
    x = 489,933.21

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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.