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Finding the Fourth Proportional to 391,751.92, 540,617.88 and 212,903.92

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Solution

The fourth proportional to 391,751.92, 540,617.88 and 212,903.92 is: 293,807.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,751.92 : 540,617.88 = 212,903.92 : x
  2. Step 2: Convert to fraction form
    391,751.92/540,617.88 = 212,903.92/x
  3. Step 3: Cross multiply
    391,751.92x = 540,617.88 × 212,903.92
  4. Step 4: Simplify right side
    391,751.92x = 115,099,665,874.09
  5. Step 5: Solve for x
    x = 115,099,665,874.09/391,751.92
  6. Step 6: Final answer
    x = 293,807.53

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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.