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Finding the Fourth Proportional to 212,920.60, 319,380.90 and 181,257.70

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Solution

The fourth proportional to 212,920.60, 319,380.90 and 181,257.70 is: 271,886.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,920.60 : 319,380.90 = 181,257.70 : x
  2. Step 2: Convert to fraction form
    212,920.60/319,380.90 = 181,257.70/x
  3. Step 3: Cross multiply
    212,920.60x = 319,380.90 × 181,257.70
  4. Step 4: Simplify right side
    212,920.60x = 57,890,247,357.93
  5. Step 5: Solve for x
    x = 57,890,247,357.93/212,920.60
  6. Step 6: Final answer
    x = 271,886.55

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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.