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Finding the Fourth Proportional to 212,711.60, 319,067.40 and 207,462.80

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Solution

The fourth proportional to 212,711.60, 319,067.40 and 207,462.80 is: 311,194.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,711.60 : 319,067.40 = 207,462.80 : x
  2. Step 2: Convert to fraction form
    212,711.60/319,067.40 = 207,462.80/x
  3. Step 3: Cross multiply
    212,711.60x = 319,067.40 × 207,462.80
  4. Step 4: Simplify right side
    212,711.60x = 66,194,616,192.72
  5. Step 5: Solve for x
    x = 66,194,616,192.72/212,711.60
  6. Step 6: Final answer
    x = 311,194.20

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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.