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Finding the Fourth Proportional to 312,745.54, 431,581.88 and 176,761.40

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Solution

The fourth proportional to 312,745.54, 431,581.88 and 176,761.40 is: 243,926.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,745.54 : 431,581.88 = 176,761.40 : x
  2. Step 2: Convert to fraction form
    312,745.54/431,581.88 = 176,761.40/x
  3. Step 3: Cross multiply
    312,745.54x = 431,581.88 × 176,761.40
  4. Step 4: Simplify right side
    312,745.54x = 76,287,017,323.43
  5. Step 5: Solve for x
    x = 76,287,017,323.43/312,745.54
  6. Step 6: Final answer
    x = 243,926.80

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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.