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Finding the Fourth Proportional to 212,873.80, 319,310.70 and 188,912.20

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Solution

The fourth proportional to 212,873.80, 319,310.70 and 188,912.20 is: 283,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,873.80 : 319,310.70 = 188,912.20 : x
  2. Step 2: Convert to fraction form
    212,873.80/319,310.70 = 188,912.20/x
  3. Step 3: Cross multiply
    212,873.80x = 319,310.70 × 188,912.20
  4. Step 4: Simplify right side
    212,873.80x = 60,321,686,820.54
  5. Step 5: Solve for x
    x = 60,321,686,820.54/212,873.80
  6. Step 6: Final answer
    x = 283,368.30

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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.