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Finding the Fourth Proportional to 263,348.20, 395,084.70 and 85,856.20

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Solution

The fourth proportional to 263,348.20, 395,084.70 and 85,856.20 is: 128,804.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,348.20 : 395,084.70 = 85,856.20 : x
  2. Step 2: Convert to fraction form
    263,348.20/395,084.70 = 85,856.20/x
  3. Step 3: Cross multiply
    263,348.20x = 395,084.70 × 85,856.20
  4. Step 4: Simplify right side
    263,348.20x = 33,920,471,020.14
  5. Step 5: Solve for x
    x = 33,920,471,020.14/263,348.20
  6. Step 6: Final answer
    x = 128,804.64

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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.