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Finding the Fourth Proportional to 212,853.80, 319,280.70 and 188,892.20

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Solution

The fourth proportional to 212,853.80, 319,280.70 and 188,892.20 is: 283,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,853.80 : 319,280.70 = 188,892.20 : x
  2. Step 2: Convert to fraction form
    212,853.80/319,280.70 = 188,892.20/x
  3. Step 3: Cross multiply
    212,853.80x = 319,280.70 × 188,892.20
  4. Step 4: Simplify right side
    212,853.80x = 60,309,633,840.54
  5. Step 5: Solve for x
    x = 60,309,633,840.54/212,853.80
  6. Step 6: Final answer
    x = 283,338.30

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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.